Commit iniziale

node_modules/tedious/benchmarks/README.md

@@ -0,0 +1,12 @@
+# Tedious Benchmarks
+
+This folder contains a collection of benchmarks for `tedious`.
+
+Running an existing benchmark is easy, simply execute the benchmark file with `node`:
+
+```sh
+node benchmarks/query/select-many-rows.js
+```
+
+**NOTE:** The benchmarks try to load `tedious` code from `lib`, so make sure
+you run `npm run prepublish` first.

node_modules/tedious/benchmarks/bulk-load/iterable.js

@@ -0,0 +1,61 @@
+// @ts-check
+
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100],
+  size: [
+    10,
+    100,
+    1000,
+    10000
+  ]
+});
+
+function main({ n, size }) {
+  createConnection((connection) => {
+    const request = new Request(`
+      CREATE TABLE "#tmpTestTable" (
+        "id" int NOT NULL
+      )
+    `, (err) => {
+      if (err) {
+        throw err;
+      }
+
+      let i = 0;
+
+      bench.start();
+
+      (function cb() {
+        const bulkLoad = connection.newBulkLoad('#tmpTestTable', (err) => {
+          if (err) {
+            throw err;
+          }
+
+          if (i++ === n) {
+            bench.end(n);
+
+            connection.close();
+
+            return;
+          }
+
+          cb();
+        });
+
+        bulkLoad.addColumn('id', TYPES.Int, { nullable: false });
+
+        const rows = [];
+        for (let j = 0; j < size; j++) {
+          rows.push([ j ]);
+        }
+        connection.execBulkLoad(bulkLoad, rows);
+      })();
+    });
+
+    connection.execSqlBatch(request);
+  });
+}

node_modules/tedious/benchmarks/common.js

@@ -0,0 +1,287 @@
+'use strict';
+
+const fs = require('fs');
+const child_process = require('child_process');
+
+const {
+  PerformanceObserver,
+  constants: {
+    NODE_PERFORMANCE_GC_INCREMENTAL,
+    NODE_PERFORMANCE_GC_MAJOR,
+    NODE_PERFORMANCE_GC_MINOR
+  }
+} = require('perf_hooks');
+
+const { Connection } = require('tedious');
+
+// The `Benchmark` class is taken from Node.js - see
+// https://github.com/nodejs/node/blob/0f96dc266fd0cd8c1baa82ce7eb951c11b29a331/benchmark/common.js
+// Copyright Node.js contributors. All rights reserved.
+function Benchmark(fn, configs, options) {
+  // Use the file name as the name of the benchmark
+  this.name = require.main.filename.slice(__dirname.length + 1);
+  // Parse job-specific configuration from the command line arguments
+  const parsed_args = this._parseArgs(process.argv.slice(2), configs);
+  this.options = parsed_args.cli;
+  this.extra_options = parsed_args.extra;
+  // The configuration list as a queue of jobs
+  this.queue = this._queue(this.options);
+  // The configuration of the current job, head of the queue
+  this.config = this.queue[0];
+  // Execution arguments i.e. flags used to run the jobs
+  this.flags = [];
+  if (options && options.flags) {
+    this.flags = this.flags.concat(options.flags);
+  }
+  if (process.env.NODE_BENCHMARK_FLAGS) {
+    const flags = process.env.NODE_BENCHMARK_FLAGS.split(/\s+/);
+    this.flags = this.flags.concat(flags);
+  }
+  // Holds process.hrtime value
+  this._time = [0, 0];
+  // Used to make sure a benchmark only start a timer once
+  this._started = false;
+
+  this._gcStats = {
+    [NODE_PERFORMANCE_GC_INCREMENTAL]: {
+      count: 0,
+      totalDuration: 0
+    },
+    [NODE_PERFORMANCE_GC_MINOR]: {
+      count: 0,
+      totalDuration: 0
+    },
+    [NODE_PERFORMANCE_GC_MAJOR]: {
+      count: 0,
+      totalDuration: 0
+    }
+  };
+
+  this._observer = new PerformanceObserver((list) => {
+    const entries = list.getEntries();
+    const length = entries.length;
+
+    for (let i = 0; i < length; i++) {
+      const entry = entries[i];
+      const stats = this._gcStats[entry.detail.kind];
+
+      if (stats) {
+        stats.count += 1;
+        stats.totalDuration += entry.duration;
+      }
+    }
+  });
+
+  // this._run will use fork() to create a new process for each configuration
+  // combination.
+  if (process.env.hasOwnProperty('NODE_RUN_BENCHMARK_FN')) {
+    process.nextTick(() => fn(this.config));
+  } else {
+    process.nextTick(() => this._run());
+  }
+}
+
+Benchmark.prototype._parseArgs = function(argv, configs) {
+  const cliOptions = {};
+  const extraOptions = {};
+  const validArgRE = /^(.+?)=([\s\S]*)$/;
+  // Parse configuration arguments
+  for (const arg of argv) {
+    const match = arg.match(validArgRE);
+    if (!match) {
+      console.error(`bad argument: ${arg}`);
+      process.exit(1);
+    }
+    const config = match[1];
+
+    if (configs[config]) {
+      // Infer the type from the config object and parse accordingly
+      const isNumber = typeof configs[config][0] === 'number';
+      const value = isNumber ? +match[2] : match[2];
+      if (!cliOptions[config])
+        cliOptions[config] = [];
+      cliOptions[config].push(value);
+    } else {
+      extraOptions[config] = match[2];
+    }
+  }
+  return { cli: Object.assign({}, configs, cliOptions), extra: extraOptions };
+};
+
+Benchmark.prototype._queue = function(options) {
+  const queue = [];
+  const keys = Object.keys(options);
+
+  // Perform a depth-first walk though all options to generate a
+  // configuration list that contains all combinations.
+  function recursive(keyIndex, prevConfig) {
+    const key = keys[keyIndex];
+    const values = options[key];
+    const type = typeof values[0];
+
+    for (const value of values) {
+      if (typeof value !== 'number' && typeof value !== 'string') {
+        throw new TypeError(`configuration "${key}" had type ${typeof value}`);
+      }
+      if (typeof value !== type) {
+        // This is a requirement for being able to consistently and predictably
+        // parse CLI provided configuration values.
+        throw new TypeError(`configuration "${key}" has mixed types`);
+      }
+
+      const currConfig = Object.assign({ [key]: value }, prevConfig);
+
+      if (keyIndex + 1 < keys.length) {
+        recursive(keyIndex + 1, currConfig);
+      } else {
+        queue.push(currConfig);
+      }
+    }
+  }
+
+  if (keys.length > 0) {
+    recursive(0, {});
+  } else {
+    queue.push({});
+  }
+
+  return queue;
+};
+
+Benchmark.prototype._run = function() {
+  const self = this;
+  // If forked, report to the parent.
+  if (process.send) {
+    process.send({
+      type: 'config',
+      name: this.name,
+      queueLength: this.queue.length,
+    });
+  }
+
+  (function recursive(queueIndex) {
+    const config = self.queue[queueIndex];
+
+    // Set NODE_RUN_BENCHMARK_FN to indicate that the child shouldn't construct
+    // a configuration queue, but just execute the benchmark function.
+    const childEnv = Object.assign({}, process.env);
+    childEnv.NODE_RUN_BENCHMARK_FN = '';
+
+    // Create configuration arguments
+    const childArgs = [];
+    for (const key of Object.keys(config)) {
+      childArgs.push(`${key}=${config[key]}`);
+    }
+    for (const key of Object.keys(self.extra_options)) {
+      childArgs.push(`${key}=${self.extra_options[key]}`);
+    }
+
+    const child = child_process.fork(require.main.filename, childArgs, {
+      env: childEnv,
+      execArgv: self.flags.concat(process.execArgv),
+    });
+    child.on('message', sendResult);
+    child.on('close', (code) => {
+      if (code) {
+        process.exit(code);
+      }
+
+      if (queueIndex + 1 < self.queue.length) {
+        recursive(queueIndex + 1);
+      }
+    });
+  })(0);
+};
+
+Benchmark.prototype.start = function() {
+  if (this._started) {
+    throw new Error('Called start more than once in a single benchmark');
+  }
+  this._started = true;
+  this._observer.observe({ entryTypes: ['gc'], buffered: false });
+
+  this._time = process.hrtime();
+};
+
+Benchmark.prototype.end = function(operations) {
+  // Get elapsed time now and do error checking later for accuracy.
+  const elapsed = process.hrtime(this._time);
+
+  if (!this._started) {
+    throw new Error('called end without start');
+  }
+  if (typeof operations !== 'number') {
+    throw new Error('called end() without specifying operation count');
+  }
+  if (!process.env.NODEJS_BENCHMARK_ZERO_ALLOWED && operations <= 0) {
+    throw new Error('called end() with operation count <= 0');
+  }
+  if (elapsed[0] === 0 && elapsed[1] === 0) {
+    if (!process.env.NODEJS_BENCHMARK_ZERO_ALLOWED)
+      throw new Error('insufficient clock precision for short benchmark');
+    // Avoid dividing by zero
+    elapsed[1] = 1;
+  }
+
+  this._observer.disconnect();
+
+  const time = elapsed[0] + elapsed[1] / 1e9;
+  const rate = operations / time;
+  this.report(rate, elapsed);
+};
+
+function formatResult(data) {
+  // Construct configuration string, " A=a, B=b, ..."
+  let conf = '';
+  for (const key of Object.keys(data.conf)) {
+    conf += ` ${key}=${JSON.stringify(data.conf[key])}`;
+  }
+
+  var rate = data.rate.toString().split('.');
+  rate[0] = rate[0].replace(/(\d)(?=(?:\d\d\d)+(?!\d))/g, '$1,');
+  rate = (rate[1] ? rate.join('.') : rate[0]);
+
+  var gcInfo;
+  gcInfo = `(minor: ${data.gcStats[NODE_PERFORMANCE_GC_MINOR].count} - ${data.gcStats[NODE_PERFORMANCE_GC_MINOR].totalDuration}ms,`;
+  gcInfo += ` major: ${data.gcStats[NODE_PERFORMANCE_GC_MAJOR].count} - ${data.gcStats[NODE_PERFORMANCE_GC_MAJOR].totalDuration}ms,`;
+  gcInfo += ` incremental: ${data.gcStats[NODE_PERFORMANCE_GC_INCREMENTAL].count} - ${data.gcStats[NODE_PERFORMANCE_GC_INCREMENTAL].totalDuration}ms)`;
+
+  return `${data.name}${conf}: ${rate} ${gcInfo}`;
+}
+
+function sendResult(data) {
+  if (process.send) {
+    // If forked, report by process send
+    process.send(data);
+  } else {
+    // Otherwise report by stdout
+    console.log(formatResult(data));
+  }
+}
+
+Benchmark.prototype.report = function(rate, elapsed) {
+  sendResult({
+    name: this.name,
+    conf: this.config,
+    rate: rate,
+    time: elapsed[0] + elapsed[1] / 1e9,
+    type: 'report',
+    gcStats: this._gcStats
+  });
+};
+
+function createBenchmark(fn, configs, options) {
+  return new Benchmark(fn, configs, options);
+}
+
+function createConnection(cb) {
+  var config = JSON.parse(fs.readFileSync(require('os').homedir() + '/.tedious/test-connection.json', 'utf8')).config;
+
+  var connection = new Connection(config);
+  connection.connect(function() {
+    cb(connection);
+  });
+}
+
+module.exports.createBenchmark = createBenchmark;
+module.exports.createConnection = createConnection;

node_modules/tedious/benchmarks/connection/open.js

@@ -0,0 +1,26 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const bench = createBenchmark(main, {
+  n: [10, 100]
+});
+
+function main({ n }) {
+  let i = 0;
+  bench.start();
+
+  (function cb() {
+    createConnection(function(connection) {
+      connection.close();
+
+      if (i++ === n) {
+        bench.end(n);
+
+        connection.close();
+
+        return;
+      }
+
+      cb();
+    });
+  })();
+}

node_modules/tedious/benchmarks/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "tedious-benchmarks",
+  "version": "1.0.0",
+  "description": "This folder contains a collection of benchmarks for `tedious`.",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "dependencies": {
+    "tedious": "file:.."
+  }
+}

node_modules/tedious/benchmarks/query/call-tvp.js

@@ -0,0 +1,105 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100]
+});
+
+function main({ n }) {
+  createConnection(function(connection) {
+    const request = new Request(`
+      USE tempdb;
+
+      DROP TYPE IF EXISTS TediousTestType;
+
+      CREATE TYPE TediousTestType AS TABLE (
+        FileId uniqueidentifier,
+        FileNumber bigint,
+        FileVersion varchar(20),
+        FileCommitID varchar(40),
+        FileModel nvarchar(max)
+      );
+    `, (err) => {
+      if (err) {
+        throw err;
+      }
+
+      const request = new Request(`
+        CREATE PROCEDURE #__tediousTvpTest @tvp TediousTestType readonly AS BEGIN select COUNT(*) from @tvp END
+      `, (err) => {
+        if (err) {
+          throw err;
+        }
+
+        const tvp = {
+          columns: [
+            {
+              name: 'FileId',
+              type: TYPES.UniqueIdentifier
+            },
+            {
+              name: 'FileNumber',
+              type: TYPES.BigInt
+            },
+            {
+              name: 'FileVersion',
+              type: TYPES.VarChar,
+              length: 20,
+            },
+            {
+              name: 'FileCommitID',
+              type: TYPES.VarChar,
+              length: 40,
+            },
+            {
+              name: 'FileModel',
+              type: TYPES.NVarChar,
+              length: Infinity
+            }
+          ],
+          rows: []
+        };
+
+        for (let i = 0; i < 500; i++) {
+          tvp.rows.push([
+            '6F9619FF-8B86-D011-B42D-00C04FC964FF',
+            1,
+            '12345',
+            '6b8bd41619d843b35b13478bb8aa88ea67039a05',
+            new Array(5000).join('x')
+          ]);
+        }
+
+        let i = 0;
+        bench.start();
+
+        (function cb() {
+          const request = new Request('#__tediousTvpTest', (err) => {
+            if (err) {
+              throw err;
+            }
+
+            if (i++ === n) {
+              bench.end(n);
+
+              connection.close();
+
+              return;
+            }
+
+            cb();
+          });
+
+          request.addParameter('tvp', TYPES.TVP, tvp);
+
+          connection.callProcedure(request);
+        })();
+      });
+
+      connection.execSqlBatch(request);
+    });
+
+    connection.execSqlBatch(request);
+  });
+}

node_modules/tedious/benchmarks/query/insert-varbinary.js

@@ -0,0 +1,46 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100],
+  size: [
+    10,
+    1024,
+    1024 * 1024,
+    10 * 1024 * 1024
+  ]
+});
+
+function main({ n, size }) {
+  createConnection(function(connection) {
+    const buf = Buffer.alloc(size);
+    buf.fill('x');
+
+    let i = 0;
+
+    bench.start();
+
+    (function cb() {
+      const request = new Request('SELECT DATALENGTH(@value)', (err) => {
+        if (err) {
+          throw err;
+        }
+
+        if (i++ === n) {
+          bench.end(n);
+
+          connection.close();
+
+          return;
+        }
+
+        cb();
+      });
+
+      request.addParameter('value', TYPES.VarBinary, buf);
+
+      connection.execSql(request);
+    })();
+  });
+}

node_modules/tedious/benchmarks/query/select-many-rows.js

@@ -0,0 +1,63 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100, 1000],
+  size: [10, 100, 1000, 10000]
+});
+
+function main({ n, size }) {
+  createConnection(function(connection) {
+    const request = new Request('CREATE TABLE #benchmark ([id] int IDENTITY(1,1), [name] nvarchar(100), [description] nvarchar(max))', (err) => {
+      if (err) {
+        throw err;
+      }
+
+      (function insertNext(num, done) {
+        var request = new Request('INSERT INTO #benchmark ([name], [description]) VALUES (@name, @description)', (err) => {
+          if (err) {
+            throw err;
+          }
+
+          if (num === size) {
+            done();
+          } else {
+            insertNext(num + 1, done);
+          }
+        });
+
+        request.addParameter('name', TYPES.NVarChar, 'Row ' + n);
+        request.addParameter('description', TYPES.NVarChar, 'Example Test Description for Row ' + n);
+
+        connection.execSql(request);
+      })(0, (err) => {
+        let i = 0;
+
+        bench.start();
+
+        (function cb() {
+          const request = new Request('SELECT * FROM #benchmark', (err) => {
+            if (err) {
+              throw err;
+            }
+
+            if (i++ === n) {
+              bench.end(n);
+
+              connection.close();
+
+              return;
+            }
+
+            cb();
+          });
+
+          connection.execSql(request);
+        })();
+      });
+    });
+
+    connection.execSqlBatch(request);
+  });
+}

node_modules/tedious/benchmarks/query/select-nvarchar.js

@@ -0,0 +1,50 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100, 1000],
+  size: [10, 100, 1000, 10000]
+});
+
+function main({ n, size }) {
+  createConnection(function(connection) {
+    const request = new Request('CREATE TABLE #benchmark ([value] nvarchar(max))', (err) => {
+      if (err) {
+        throw err;
+      }
+
+      var request = new Request('INSERT INTO #benchmark ([value]) VALUES (@value)', (err) => {
+        let i = 0;
+
+        bench.start();
+
+        (function cb() {
+          const request = new Request('SELECT * FROM #benchmark', (err) => {
+            if (err) {
+              throw err;
+            }
+
+            if (i++ === n) {
+              bench.end(n);
+
+              connection.close();
+
+              return;
+            }
+
+            cb();
+          });
+
+          connection.execSql(request);
+        })();
+      });
+
+      const value = 'a'.repeat(size);
+      request.addParameter('value', TYPES.NVarChar, value);
+      connection.execSql(request);
+    });
+
+    connection.execSqlBatch(request);
+  });
+}

node_modules/tedious/benchmarks/query/select-varbinary.js

@@ -0,0 +1,50 @@
+const { createBenchmark, createConnection } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+
+const bench = createBenchmark(main, {
+  n: [10, 100],
+  size: [10, 100, 1000, 10000, 1024 * 1024, 10 * 1024 * 1024]
+});
+
+function main({ n, size }) {
+  createConnection(function(connection) {
+    const request = new Request('CREATE TABLE #benchmark ([value] varbinary(max))', (err) => {
+      if (err) {
+        throw err;
+      }
+
+      var request = new Request('INSERT INTO #benchmark ([value]) VALUES (@value)', (err) => {
+        let i = 0;
+
+        bench.start();
+
+        (function cb() {
+          const request = new Request('SELECT * FROM #benchmark', (err) => {
+            if (err) {
+              throw err;
+            }
+
+            if (i++ === n) {
+              bench.end(n);
+
+              connection.close();
+
+              return;
+            }
+
+            cb();
+          });
+
+          connection.execSql(request);
+        })();
+      });
+
+      const value = Buffer.alloc(size, 'a');
+      request.addParameter('value', TYPES.VarBinary, value);
+      connection.execSql(request);
+    });
+
+    connection.execSqlBatch(request);
+  });
+}

node_modules/tedious/benchmarks/request/rpcrequest-payload-tvp.js

@@ -0,0 +1,45 @@
+const { createBenchmark } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+const RpcRequestPayload = require('tedious/lib/rpcrequest-payload');
+
+const { Readable } = require('stream');
+
+const bench = createBenchmark(main, {
+  n: [10, 100],
+  size: [10, 100, 1000, 10000]
+});
+
+function main({ n, size }) {
+  var table = {
+    columns: [
+      { name: 'user_id', type: TYPES.Int },
+      { name: 'user_name', type: TYPES.VarChar, length: 500 },
+      { name: 'user_enabled', type: TYPES.Bit }
+    ],
+    rows: []
+  };
+
+  for (let j = 0; j < size; j++) {
+    table.rows.push([15, 'Eric', true]);
+  }
+
+  const request = new Request('...', () => {});
+  request.addParameter('value', TYPES.TVP, table);
+  request.validateParameters();
+
+  let i = 0;
+  bench.start();
+
+  (function cb() {
+    if (i++ === n) {
+      bench.end(n);
+      return;
+    }
+
+    const payload = new RpcRequestPayload(request.sqlTextOrProcedure, request.parameters, Buffer.alloc(0), {}, undefined);
+    const stream = Readable.from(payload);
+    stream.on('data', () => {});
+    stream.on('end', cb);
+  })();
+}

node_modules/tedious/benchmarks/request/rpcrequest-payload-varbinary.js

@@ -0,0 +1,37 @@
+const { createBenchmark } = require('../common');
+
+const { Request, TYPES } = require('tedious');
+const RpcRequestPayload = require('tedious/lib/rpcrequest-payload');
+
+const { Readable } = require('stream');
+
+const bench = createBenchmark(main, {
+  n: [10, 100],
+  size: [
+    1024 * 1024,
+    10 * 1024 * 1024,
+    50 * 1024 * 1024,
+  ]
+});
+
+function main({ n, size }) {
+  const buf = Buffer.alloc(size, 'x');
+
+  const request = new Request('...', () => {});
+  request.addParameter('value', TYPES.VarBinary, buf);
+
+  let i = 0;
+  bench.start();
+
+  (function cb() {
+    if (i++ === n) {
+      bench.end(n);
+      return;
+    }
+
+    const payload = new RpcRequestPayload(request.sqlTextOrProcedure, request.parameters, Buffer.alloc(0), {}, undefined);
+    const stream = Readable.from(payload);
+    stream.on('data', () => {});
+    stream.on('end', cb);
+  })();
+}

node_modules/tedious/benchmarks/token-parser/colmetadata-token.js

@@ -0,0 +1,27 @@
+const { createBenchmark } = require('../common');
+
+const { Parser } = require('tedious/lib/token/token-stream-parser');
+
+const bench = createBenchmark(main, {
+  n: [10, 100, 1000],
+  tokenCount: [10, 100, 1000, 10000]
+});
+
+async function * repeat(data, n) {
+  for (let i = 0; i < n; i++) {
+    yield data;
+  }
+}
+
+function main({ n, tokenCount }) {
+  const data = Buffer.from('810300000000001000380269006400000000000900e7c8000904d00034046e0061006d006500000000000900e7ffff0904d000340b6400650073006300720069007000740069006f006e00'.repeat(tokenCount), 'hex');
+  const parser = new Parser(repeat(data, n), { token: function() { } }, {
+    onColMetadata: (token) => { }
+  }, {});
+
+  bench.start();
+
+  parser.on('end', () => {
+    bench.end(n);
+  });
+}

node_modules/tedious/benchmarks/token-parser/done-token.js

@@ -0,0 +1,28 @@
+const { createBenchmark } = require('../common');
+
+const { Parser } = require('tedious/lib/token/token-stream-parser');
+
+const bench = createBenchmark(main, {
+  n: [10, 100, 1000],
+  tokenCount: [10, 100, 1000, 10000]
+});
+
+async function * repeat(data, n) {
+  for (let i = 0; i < n; i++) {
+    yield data;
+  }
+}
+
+function main({ n, tokenCount }) {
+  const data = Buffer.from('FE0000E0000000000000000000'.repeat(tokenCount), 'hex');
+
+  const parser = new Parser(repeat(data, n), { token: function() { } }, {
+    onDoneProc: (token) => { }
+  }, {});
+
+  bench.start();
+
+  parser.on('end', () => {
+    bench.end(n);
+  });
+}

node_modules/tedious/benchmarks/token-parser/simple-tokens.js

@@ -0,0 +1,363 @@
+const { createBenchmark } = require('../common');
+
+const { Parser } = require('tedious/lib/token/token-stream-parser');
+
+const bench = createBenchmark(main, {
+  n: [10, 100, 1000]
+});
+
+async function * repeat(data, n) {
+  for (let i = 0; i < n; i++) {
+    yield data;
+  }
+}
+
+function main({ n }) {
+  const data = Buffer.from([
+    '810300000000001000380269006400000000000900E7C8000904D00034046E00',
+    '61006D006500000000000900E7FFFF0904D000340B6400650073006300720069',
+    '007000740069006F006E00D1010000000A0052006F0077002000300044000000',
+    '00000000440000004500780061006D0070006C00650020005400650073007400',
+    '20004400650073006300720069007000740069006F006E00200066006F007200',
+    '200052006F0077002000300000000000D1020000000A0052006F007700200031',
+    '004400000000000000440000004500780061006D0070006C0065002000540065',
+    '007300740020004400650073006300720069007000740069006F006E00200066',
+    '006F007200200052006F0077002000310000000000D1030000000A0052006F00',
+    '7700200032004400000000000000440000004500780061006D0070006C006500',
+    '2000540065007300740020004400650073006300720069007000740069006F00',
+    '6E00200066006F007200200052006F0077002000320000000000D1040000000A',
+    '0052006F007700200033004400000000000000440000004500780061006D0070',
+    '006C006500200054006500730074002000440065007300630072006900700074',
+    '0069006F006E00200066006F007200200052006F0077002000330000000000D1',
+    '050000000A0052006F0077002000340044000000000000004400000045007800',
+    '61006D0070006C00650020005400650073007400200044006500730063007200',
+    '69007000740069006F006E00200066006F007200200052006F00770020003400',
+    '00000000D1060000000A0052006F007700200035004400000000000000440000',
+    '004500780061006D0070006C0065002000540065007300740020004400650073',
+    '006300720069007000740069006F006E00200066006F007200200052006F0077',
+    '002000350000000000D1070000000A0052006F00770020003600440000000000',
+    '0000440000004500780061006D0070006C006500200054006500730074002000',
+    '4400650073006300720069007000740069006F006E00200066006F0072002000',
+    '52006F0077002000360000000000D1080000000A0052006F0077002000370044',
+    '00000000000000440000004500780061006D0070006C00650020005400650073',
+    '00740020004400650073006300720069007000740069006F006E00200066006F',
+    '007200200052006F0077002000370000000000D1090000000A0052006F007700',
+    '200038004400000000000000440000004500780061006D0070006C0065002000',
+    '540065007300740020004400650073006300720069007000740069006F006E00',
+    '200066006F007200200052006F0077002000380000000000D10A0000000A0052',
+    '006F007700200039004400000000000000440000004500780061006D0070006C',
+    '0065002000540065007300740020004400650073006300720069007000740069',
+    '006F006E00200066006F007200200052006F0077002000390000000000D10B00',
+    '00000C0052006F00770020003100300046000000000000004600000045007800',
+    '61006D0070006C00650020005400650073007400200044006500730063007200',
+    '69007000740069006F006E00200066006F007200200052006F00770020003100',
+    '300000000000D10C0000000C0052006F00770020003100310046000000000000',
+    '00460000004500780061006D0070006C00650020005400650073007400200044',
+    '00650073006300720069007000740069006F006E00200066006F007200200052',
+    '006F00770020003100310000000000D10D0000000C0052006F00770020003100',
+    '32004600000000000000460000004500780061006D0070006C00650020005400',
+    '65007300740020004400650073006300720069007000740069006F006E002000',
+    '66006F007200200052006F00770020003100320000000000D10E0000000C0052',
+    '006F0077002000310033004600000000000000460000004500780061006D0070',
+    '006C006500200054006500730074002000440065007300630072006900700074',
+    '0069006F006E00200066006F007200200052006F007700200031003300000000',
+    '00D10F0000000C0052006F007700200031003400460000000000000046000000',
+    '4500780061006D0070006C006500200054006500730074002000440065007300',
+    '6300720069007000740069006F006E00200066006F007200200052006F007700',
+    '20003100340000000000D1100000000C0052006F007700200031003500460000',
+    '0000000000460000004500780061006D0070006C006500200054006500730074',
+    '0020004400650073006300720069007000740069006F006E00200066006F0072',
+    '00200052006F00770020003100350000000000D1110000000C0052006F007700',
+    '2000310036004600000000000000460000004500780061006D0070006C006500',
+    '2000540065007300740020004400650073006300720069007000740069006F00',
+    '6E00200066006F007200200052006F00770020003100360000000000D1120000',
+    '000C0052006F0077002000310037004600000000000000460000004500780061',
+    '006D0070006C0065002000540065007300740020004400650073006300720069',
+    '007000740069006F006E00200066006F007200200052006F0077002000310037',
+    '0000000000D1130000000C0052006F0077002000310038004600000000000000',
+    '460000004500780061006D0070006C0065002000540065007300740020004400',
+    '650073006300720069007000740069006F006E00200066006F00720020005200',
+    '6F00770020003100380000000000D1140000000C0052006F0077002000310039',
+    '004600000000000000460000004500780061006D0070006C0065002000540065',
+    '007300740020004400650073006300720069007000740069006F006E00200066',
+    '006F007200200052006F00770020003100390000000000D1150000000C005200',
+    '6F0077002000320030004600000000000000460000004500780061006D007000',
+    '6C00650020005400650073007400200044006500730063007200690070007400',
+    '69006F006E00200066006F007200200052006F00770020003200300000000000',
+    'D1160000000C0052006F00770020003200310046000000000000004600000045',
+    '00780061006D0070006C00650020005400650073007400200044006500730063',
+    '00720069007000740069006F006E00200066006F007200200052006F00770020',
+    '003200310000000000D1170000000C0052006F00770020003200320046000000',
+    '00000000460000004500780061006D0070006C00650020005400650073007400',
+    '20004400650073006300720069007000740069006F006E00200066006F007200',
+    '200052006F00770020003200320000000000D1180000000C0052006F00770020',
+    '00320033004600000000000000460000004500780061006D0070006C00650020',
+    '00540065007300740020004400650073006300720069007000740069006F006E',
+    '00200066006F007200200052006F00770020003200330000000000D119000000',
+    '0C0052006F007700200032003400460000000000000046000000450078006100',
+    '6D0070006C006500200054006500730074002000440065007300630072006900',
+    '7000740069006F006E00200066006F007200200052006F007700200032003400',
+    '00000000D11A0000000C0052006F007700200032003500460000000000000046',
+    '0000004500780061006D0070006C006500200054006500730074002000440065',
+    '0073006300720069007000740069006F006E00200066006F007200200052006F',
+    '00770020003200350000000000D11B0000000C0052006F007700200032003600',
+    '4600000000000000460000004500780061006D0070006C006500200054006500',
+    '7300740020004400650073006300720069007000740069006F006E0020006600',
+    '6F007200200052006F00770020003200360000000000D11C0000000C0052006F',
+    '0077002000320037004600000000000000460000004500780061006D0070006C',
+    '0065002000540065007300740020004400650073006300720069007000740069',
+    '006F006E00200066006F007200200052006F00770020003200370000000000D1',
+    '1D0000000C0052006F0077002000320038004600000000000000460000004500',
+    '780061006D0070006C0065002000540065007300740020004400650073006300',
+    '720069007000740069006F006E00200066006F007200200052006F0077002000',
+    '3200380000000000D11E0000000C0052006F0077002000320039004600000000',
+    '000000460000004500780061006D0070006C0065002000540065007300740020',
+    '004400650073006300720069007000740069006F006E00200066006F00720020',
+    '0052006F00770020003200390000000000D11F0000000C0052006F0077002000',
+    '330030004600000000000000460000004500780061006D0070006C0065002000',
+    '540065007300740020004400650073006300720069007000740069006F006E00',
+    '200066006F007200200052006F00770020003300300000000000D1200000000C',
+    '0052006F0077002000330031004600000000000000460000004500780061006D',
+    '0070006C00650020005400650073007400200044006500730063007200690070',
+    '00740069006F006E00200066006F007200200052006F00770020003300310000',
+    '000000D1210000000C0052006F00770020003300320046000000000000004600',
+    '00004500780061006D0070006C00650020005400650073007400200044006500',
+    '73006300720069007000740069006F006E00200066006F007200200052006F00',
+    '770020003300320000000000D1220000000C0052006F00770020003300330046',
+    '00000000000000460000004500780061006D0070006C00650020005400650073',
+    '00740020004400650073006300720069007000740069006F006E00200066006F',
+    '007200200052006F00770020003300330000000000D1230000000C0052006F00',
+    '77002000330034004600000000000000460000004500780061006D0070006C00',
+    '6500200054006500730074002000440065007300630072006900700074006900',
+    '6F006E00200066006F007200200052006F00770020003300340000000000D124',
+    '0000000C0052006F007700200033003500460000000000000046000000450078',
+    '0061006D0070006C006500200054006500730074002000440065007300630072',
+    '0069007000740069006F006E00200066006F007200200052006F007700200033',
+    '00350000000000D1250000000C0052006F007700200033003600460000000000',
+    '0000460000004500780061006D0070006C006500200054006500730074002000',
+    '4400650073006300720069007000740069006F006E00200066006F0072002000',
+    '52006F00770020003300360000000000D1260000000C0052006F007700200033',
+    '0037004600000000000000460000004500780061006D0070006C006500200054',
+    '0065007300740020004400650073006300720069007000740069006F006E0020',
+    '0066006F007200200052006F00770020003300370000000000D1270000000C00',
+    '52006F0077002000330038004600000000000000200000004500780061006D00',
+    '70006C006500200054006500730074002000440065007300',
+    '260000006300720069007000740069006F006E00200066006F00720020005200',
+    '6F00770020003300380000000000D1280000000C0052006F0077002000330039',
+    '004600000000000000460000004500780061006D0070006C0065002000540065',
+    '007300740020004400650073006300720069007000740069006F006E00200066',
+    '006F007200200052006F00770020003300390000000000D1290000000C005200',
+    '6F0077002000340030004600000000000000460000004500780061006D007000',
+    '6C00650020005400650073007400200044006500730063007200690070007400',
+    '69006F006E00200066006F007200200052006F00770020003400300000000000',
+    'D12A0000000C0052006F00770020003400310046000000000000004600000045',
+    '00780061006D0070006C00650020005400650073007400200044006500730063',
+    '00720069007000740069006F006E00200066006F007200200052006F00770020',
+    '003400310000000000D12B0000000C0052006F00770020003400320046000000',
+    '00000000460000004500780061006D0070006C00650020005400650073007400',
+    '20004400650073006300720069007000740069006F006E00200066006F007200',
+    '200052006F00770020003400320000000000D12C0000000C0052006F00770020',
+    '00340033004600000000000000460000004500780061006D0070006C00650020',
+    '00540065007300740020004400650073006300720069007000740069006F006E',
+    '00200066006F007200200052006F00770020003400330000000000D12D000000',
+    '0C0052006F007700200034003400460000000000000046000000450078006100',
+    '6D0070006C006500200054006500730074002000440065007300630072006900',
+    '7000740069006F006E00200066006F007200200052006F007700200034003400',
+    '00000000D12E0000000C0052006F007700200034003500460000000000000046',
+    '0000004500780061006D0070006C006500200054006500730074002000440065',
+    '0073006300720069007000740069006F006E00200066006F007200200052006F',
+    '00770020003400350000000000D12F0000000C0052006F007700200034003600',
+    '4600000000000000460000004500780061006D0070006C006500200054006500',
+    '7300740020004400650073006300720069007000740069006F006E0020006600',
+    '6F007200200052006F00770020003400360000000000D1300000000C0052006F',
+    '0077002000340037004600000000000000460000004500780061006D0070006C',
+    '0065002000540065007300740020004400650073006300720069007000740069',
+    '006F006E00200066006F007200200052006F00770020003400370000000000D1',
+    '310000000C0052006F0077002000340038004600000000000000460000004500',
+    '780061006D0070006C0065002000540065007300740020004400650073006300',
+    '720069007000740069006F006E00200066006F007200200052006F0077002000',
+    '3400380000000000D1320000000C0052006F0077002000340039004600000000',
+    '000000460000004500780061006D0070006C0065002000540065007300740020',
+    '004400650073006300720069007000740069006F006E00200066006F00720020',
+    '0052006F00770020003400390000000000D1330000000C0052006F0077002000',
+    '350030004600000000000000460000004500780061006D0070006C0065002000',
+    '540065007300740020004400650073006300720069007000740069006F006E00',
+    '200066006F007200200052006F00770020003500300000000000D1340000000C',
+    '0052006F0077002000350031004600000000000000460000004500780061006D',
+    '0070006C00650020005400650073007400200044006500730063007200690070',
+    '00740069006F006E00200066006F007200200052006F00770020003500310000',
+    '000000D1350000000C0052006F00770020003500320046000000000000004600',
+    '00004500780061006D0070006C00650020005400650073007400200044006500',
+    '73006300720069007000740069006F006E00200066006F007200200052006F00',
+    '770020003500320000000000D1360000000C0052006F00770020003500330046',
+    '00000000000000460000004500780061006D0070006C00650020005400650073',
+    '00740020004400650073006300720069007000740069006F006E00200066006F',
+    '007200200052006F00770020003500330000000000D1370000000C0052006F00',
+    '77002000350034004600000000000000460000004500780061006D0070006C00',
+    '6500200054006500730074002000440065007300630072006900700074006900',
+    '6F006E00200066006F007200200052006F00770020003500340000000000D138',
+    '0000000C0052006F007700200035003500460000000000000046000000450078',
+    '0061006D0070006C006500200054006500730074002000440065007300630072',
+    '0069007000740069006F006E00200066006F007200200052006F007700200035',
+    '00350000000000D1390000000C0052006F007700200035003600460000000000',
+    '0000460000004500780061006D0070006C006500200054006500730074002000',
+    '4400650073006300720069007000740069006F006E00200066006F0072002000',
+    '52006F00770020003500360000000000D13A0000000C0052006F007700200035',
+    '0037004600000000000000460000004500780061006D0070006C006500200054',
+    '0065007300740020004400650073006300720069007000740069006F006E0020',
+    '0066006F007200200052006F00770020003500370000000000D13B0000000C00',
+    '52006F0077002000350038004600000000000000460000004500780061006D00',
+    '70006C0065002000540065007300740020004400650073006300720069007000',
+    '740069006F006E00200066006F007200200052006F0077002000350038000000',
+    '0000D13C0000000C0052006F0077002000350039004600000000000000460000',
+    '004500780061006D0070006C0065002000540065007300740020004400650073',
+    '006300720069007000740069006F006E00200066006F007200200052006F0077',
+    '0020003500390000000000D13D0000000C0052006F0077002000360030004600',
+    '000000000000460000004500780061006D0070006C0065002000540065007300',
+    '740020004400650073006300720069007000740069006F006E00200066006F00',
+    '7200200052006F00770020003600300000000000D13E0000000C0052006F0077',
+    '002000360031004600000000000000460000004500780061006D0070006C0065',
+    '002000540065007300740020004400650073006300720069007000740069006F',
+    '006E00200066006F007200200052006F00770020003600310000000000D13F00',
+    '00000C0052006F00770020003600320046000000000000004600000045007800',
+    '61006D0070006C00650020005400650073007400200044006500730063007200',
+    '69007000740069006F006E00200066006F007200200052006F00770020003600',
+    '320000000000D1400000000C0052006F00770020003600330046000000000000',
+    '00460000004500780061006D0070006C00650020005400650073007400200044',
+    '00650073006300720069007000740069006F006E00200066006F007200200052',
+    '006F00770020003600330000000000D1410000000C0052006F00770020003600',
+    '34004600000000000000460000004500780061006D0070006C00650020005400',
+    '65007300740020004400650073006300720069007000740069006F006E002000',
+    '66006F007200200052006F00770020003600340000000000D1420000000C0052',
+    '006F0077002000360035004600000000000000460000004500780061006D0070',
+    '006C006500200054006500730074002000440065007300630072006900700074',
+    '0069006F006E00200066006F007200200052006F007700200036003500000000',
+    '00D1430000000C0052006F007700200036003600460000000000000046000000',
+    '4500780061006D0070006C006500200054006500730074002000440065007300',
+    '6300720069007000740069006F006E00200066006F007200200052006F007700',
+    '20003600360000000000D1440000000C0052006F007700200036003700460000',
+    '0000000000460000004500780061006D0070006C006500200054006500730074',
+    '0020004400650073006300720069007000740069006F006E00200066006F0072',
+    '00200052006F00770020003600370000000000D1450000000C0052006F007700',
+    '2000360038004600000000000000460000004500780061006D0070006C006500',
+    '2000540065007300740020004400650073006300720069007000740069006F00',
+    '6E00200066006F007200200052006F00770020003600380000000000D1460000',
+    '000C0052006F0077002000360039004600000000000000460000004500780061',
+    '006D0070006C0065002000540065007300740020004400650073006300720069',
+    '007000740069006F006E00200066006F007200200052006F0077002000360039',
+    '0000000000D1470000000C0052006F0077002000370030004600000000000000',
+    '460000004500780061006D0070006C0065002000540065007300740020004400',
+    '650073006300720069007000740069006F006E00200066006F00720020005200',
+    '6F00770020003700300000000000D1480000000C0052006F0077002000370031',
+    '004600000000000000460000004500780061006D0070006C0065002000540065',
+    '007300740020004400650073006300720069007000740069006F006E00200066',
+    '006F007200200052006F00770020003700310000000000D1490000000C005200',
+    '6F0077002000370032004600000000000000460000004500780061006D007000',
+    '6C00650020005400650073007400200044006500730063007200690070007400',
+    '69006F006E00200066006F007200200052006F00770020003700320000000000',
+    'D14A0000000C0052006F00770020003700330046000000000000004600000045',
+    '00780061006D0070006C00650020005400650073007400200044006500730063',
+    '00720069007000740069006F006E00200066006F007200200052006F00770020',
+    '003700330000000000D14B0000000C0052006F00770020003700340046000000',
+    '00000000460000004500780061006D0070006C00650020005400650073007400',
+    '20004400650073006300720069007000740069006F006E00200066006F007200',
+    '200052006F00770020003700340000000000D14C0000000C0052006F00770020',
+    '00370035004600000000000000460000004500780061006D0070006C00650020',
+    '00540065007300740020004400650073006300720069007000740069006F006E',
+    '00200066006F007200200052006F00770020003700350000000000D14D000000',
+    '0C0052006F007700200037003600460000000000000046000000450078006100',
+    '6D0070006C006500200054006500730074002000440065007300630072006900',
+    '7000740069006F006E00200066006F007200200052006F007700200037003600',
+    '00000000D14E0000000C0052006F007700200037003700460000000000000015',
+    '0000004500780061006D0070006C00650020005400650073',
+    '3100000000740020004400650073006300720069007000740069006F006E0020',
+    '0066006F007200200052006F00770020003700370000000000D14F0000000C00',
+    '52006F0077002000370038004600000000000000460000004500780061006D00',
+    '70006C0065002000540065007300740020004400650073006300720069007000',
+    '740069006F006E00200066006F007200200052006F0077002000370038000000',
+    '0000D1500000000C0052006F0077002000370039004600000000000000460000',
+    '004500780061006D0070006C0065002000540065007300740020004400650073',
+    '006300720069007000740069006F006E00200066006F007200200052006F0077',
+    '0020003700390000000000D1510000000C0052006F0077002000380030004600',
+    '000000000000460000004500780061006D0070006C0065002000540065007300',
+    '740020004400650073006300720069007000740069006F006E00200066006F00',
+    '7200200052006F00770020003800300000000000D1520000000C0052006F0077',
+    '002000380031004600000000000000460000004500780061006D0070006C0065',
+    '002000540065007300740020004400650073006300720069007000740069006F',
+    '006E00200066006F007200200052006F00770020003800310000000000D15300',
+    '00000C0052006F00770020003800320046000000000000004600000045007800',
+    '61006D0070006C00650020005400650073007400200044006500730063007200',
+    '69007000740069006F006E00200066006F007200200052006F00770020003800',
+    '320000000000D1540000000C0052006F00770020003800330046000000000000',
+    '00460000004500780061006D0070006C00650020005400650073007400200044',
+    '00650073006300720069007000740069006F006E00200066006F007200200052',
+    '006F00770020003800330000000000D1550000000C0052006F00770020003800',
+    '34004600000000000000460000004500780061006D0070006C00650020005400',
+    '65007300740020004400650073006300720069007000740069006F006E002000',
+    '66006F007200200052006F00770020003800340000000000D1560000000C0052',
+    '006F0077002000380035004600000000000000460000004500780061006D0070',
+    '006C006500200054006500730074002000440065007300630072006900700074',
+    '0069006F006E00200066006F007200200052006F007700200038003500000000',
+    '00D1570000000C0052006F007700200038003600460000000000000046000000',
+    '4500780061006D0070006C006500200054006500730074002000440065007300',
+    '6300720069007000740069006F006E00200066006F007200200052006F007700',
+    '20003800360000000000D1580000000C0052006F007700200038003700460000',
+    '0000000000460000004500780061006D0070006C006500200054006500730074',
+    '0020004400650073006300720069007000740069006F006E00200066006F0072',
+    '00200052006F00770020003800370000000000D1590000000C0052006F007700',
+    '2000380038004600000000000000460000004500780061006D0070006C006500',
+    '2000540065007300740020004400650073006300720069007000740069006F00',
+    '6E00200066006F007200200052006F00770020003800380000000000D15A0000',
+    '000C0052006F0077002000380039004600000000000000460000004500780061',
+    '006D0070006C0065002000540065007300740020004400650073006300720069',
+    '007000740069006F006E00200066006F007200200052006F0077002000380039',
+    '0000000000D15B0000000C0052006F0077002000390030004600000000000000',
+    '460000004500780061006D0070006C0065002000540065007300740020004400',
+    '650073006300720069007000740069006F006E00200066006F00720020005200',
+    '6F00770020003900300000000000D15C0000000C0052006F0077002000390031',
+    '004600000000000000460000004500780061006D0070006C0065002000540065',
+    '007300740020004400650073006300720069007000740069006F006E00200066',
+    '006F007200200052006F00770020003900310000000000D15D0000000C005200',
+    '6F0077002000390032004600000000000000460000004500780061006D007000',
+    '6C00650020005400650073007400200044006500730063007200690070007400',
+    '69006F006E00200066006F007200200052006F00770020003900320000000000',
+    'D15E0000000C0052006F00770020003900330046000000000000004600000045',
+    '00780061006D0070006C00650020005400650073007400200044006500730063',
+    '00720069007000740069006F006E00200066006F007200200052006F00770020',
+    '003900330000000000D15F0000000C0052006F00770020003900340046000000',
+    '00000000460000004500780061006D0070006C00650020005400650073007400',
+    '20004400650073006300720069007000740069006F006E00200066006F007200',
+    '200052006F00770020003900340000000000D1600000000C0052006F00770020',
+    '00390035004600000000000000460000004500780061006D0070006C00650020',
+    '00540065007300740020004400650073006300720069007000740069006F006E',
+    '00200066006F007200200052006F00770020003900350000000000D161000000',
+    '0C0052006F007700200039003600460000000000000046000000450078006100',
+    '6D0070006C006500200054006500730074002000440065007300630072006900',
+    '7000740069006F006E00200066006F007200200052006F007700200039003600',
+    '00000000D1620000000C0052006F007700200039003700460000000000000046',
+    '0000004500780061006D0070006C006500200054006500730074002000440065',
+    '0073006300720069007000740069006F006E00200066006F007200200052006F',
+    '00770020003900370000000000D1630000000C0052006F007700200039003800',
+    '4600000000000000460000004500780061006D0070006C006500200054006500',
+    '7300740020004400650073006300720069007000740069006F006E0020006600',
+    '6F007200200052006F00770020003900380000000000D1640000000C0052006F',
+    '0077002000390039004600000000000000460000004500780061006D0070006C',
+    '0065002000540065007300740020004400650073006300720069007000740069',
+    '006F006E00200066006F007200200052006F00770020003900390000000000FF',
+    '1100C10064000000000000007900000000FE0000E0000000000000000000'
+  ].join(''), 'hex');
+
+  const parser = new Parser(repeat(data, n), {}, {
+    onColMetadata: () => { },
+    onRow: () => { },
+    onDoneInProc: () => { },
+    onDoneProc: () => { },
+    onReturnStatus: () => { }
+  }, {});
+
+  bench.start();
+
+  parser.on('end', () => {
+    bench.end(n);
+  });
+}