File: common.js

package info (click to toggle)
nodejs 4.8.2~dfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 62,476 kB
  • ctags: 111,183
  • sloc: cpp: 661,544; ansic: 31,406; python: 23,073; makefile: 1,418; sh: 1,384; perl: 255; lisp: 222; ruby: 76; xml: 50
file content (255 lines) | stat: -rw-r--r-- 6,537 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
'use strict';
var assert = require('assert');
var fs = require('fs');
var path = require('path');
var child_process = require('child_process');

var outputFormat = process.env.OUTPUT_FORMAT ||
                   (+process.env.NODE_BENCH_SILENT ? 'silent' : false) ||
                   'default';

// verify outputFormat
if (['default', 'csv', 'silent'].indexOf(outputFormat) == -1) {
  throw new Error('OUTPUT_FORMAT set to invalid value');
}

exports.PORT = process.env.PORT || 12346;

// If this is the main module, then run the benchmarks
if (module === require.main) {
  var type = process.argv[2];
  var testFilter = process.argv[3];
  if (!type) {
    console.error('usage:\n ./node benchmark/common.js <type> [testFilter]');
    process.exit(1);
  }

  var dir = path.join(__dirname, type);
  var tests = fs.readdirSync(dir);

  if (testFilter) {
    var filteredTests = tests.filter(function(item) {
      if (item.lastIndexOf(testFilter) >= 0) {
        return item;
      }
    });

    if (filteredTests.length === 0) {
      console.error('%s is not found in \n %j', testFilter, tests);
      return;
    }
    tests = filteredTests;
  }

  runBenchmarks();
}

function hasWrk() {
  var result = child_process.spawnSync('wrk', ['-h']);
  if (result.error && result.error.code === 'ENOENT') {
    console.error('Couldn\'t locate `wrk` which is needed for running ' +
      'benchmarks. Check benchmark/README.md for further instructions.');
    process.exit(-1);
  }
}

function runBenchmarks() {
  var test = tests.shift();
  if (!test)
    return;

  if (test.match(/^[\._]/))
    return process.nextTick(runBenchmarks);

  if (outputFormat == 'default')
    console.error(type + '/' + test);

  test = path.resolve(dir, test);

  var a = (process.execArgv || []).concat(test);
  var child = child_process.spawn(process.execPath, a, { stdio: 'inherit' });
  child.on('close', function(code) {
    if (code) {
      process.exit(code);
    } else {
      console.log('');
      runBenchmarks();
    }
  });
}

exports.createBenchmark = function(fn, options) {
  return new Benchmark(fn, options);
};

function Benchmark(fn, options) {
  this.fn = fn;
  this.options = options;
  this.config = parseOpts(options);
  this._name = require.main.filename.split(/benchmark[\/\\]/).pop();
  this._start = [0, 0];
  this._started = false;

  var self = this;

  process.nextTick(function() {
    self._run();
  });
}

// benchmark an http server.
Benchmark.prototype.http = function(p, args, cb) {
  hasWrk();
  var self = this;
  var regexp = /Requests\/sec:[ \t]+([0-9\.]+)/;
  var url = 'http://127.0.0.1:' + exports.PORT + p;

  args = args.concat(url);

  var out = '';
  var child = child_process.spawn('wrk', args);

  child.stdout.setEncoding('utf8');

  child.stdout.on('data', function(chunk) {
    out += chunk;
  });

  child.on('close', function(code) {
    if (cb)
      cb(code);

    if (code) {
      console.error('wrk failed with ' + code);
      process.exit(code);
    }
    var match = out.match(regexp);
    var qps = match && +match[1];
    if (!qps) {
      console.error('%j', out);
      console.error('wrk produced strange output');
      process.exit(1);
    }
    self.report(+qps);
  });
};

Benchmark.prototype._run = function() {
  if (this.config)
    return this.fn(this.config);

  // some options weren't set.
  // run with all combinations
  var main = require.main.filename;
  var options = this.options;

  var queue = Object.keys(options).reduce(function(set, key) {
    var vals = options[key];
    assert(Array.isArray(vals));

    // match each item in the set with each item in the list
    var newSet = new Array(set.length * vals.length);
    var j = 0;
    set.forEach(function(s) {
      vals.forEach(function(val) {
        if (typeof val !== 'number' && typeof val !== 'string') {
          throw new TypeError(`configuration "${key}" had type ${typeof val}`);
        }

        newSet[j++] = s.concat(key + '=' + val);
      });
    });
    return newSet;
  }, [[main]]);

  // output csv heading
  if (outputFormat == 'csv')
    console.log('filename,' + Object.keys(options).join(',') + ',result');

  var node = process.execPath;
  var i = 0;
  function run() {
    var argv = queue[i++];
    if (!argv)
      return;
    argv = process.execArgv.concat(argv);
    var child = child_process.spawn(node, argv, { stdio: 'inherit' });
    child.on('close', function(code, signal) {
      if (code)
        console.error('child process exited with code ' + code);
      else
        run();
    });
  }
  run();
};

function parseOpts(options) {
  // verify that there's an option provided for each of the options
  // if they're not *all* specified, then we return null.
  var keys = Object.keys(options);
  var num = keys.length;
  var conf = {};
  for (var i = 2; i < process.argv.length; i++) {
    var match = process.argv[i].match(/^(.+)=(.+)$/);
    if (!match || !match[1] || !match[2] || !options[match[1]]) {
      return null;
    } else {
      conf[match[1]] = isFinite(match[2]) ? +match[2] : match[2];
      num--;
    }
  }
  // still go ahead and set whatever WAS set, if it was.
  if (num !== 0) {
    Object.keys(conf).forEach(function(k) {
      options[k] = [conf[k]];
    });
  }
  return num === 0 ? conf : null;
}

Benchmark.prototype.start = function() {
  if (this._started)
    throw new Error('Called start more than once in a single benchmark');

  this._started = true;
  this._start = process.hrtime();
};

Benchmark.prototype.end = function(operations) {
  var elapsed = process.hrtime(this._start);

  if (!this._started)
    throw new Error('called end without start');
  if (typeof operations !== 'number')
    throw new Error('called end() without specifying operation count');

  var time = elapsed[0] + elapsed[1] / 1e9;
  var rate = operations / time;
  this.report(rate);
};

Benchmark.prototype.report = function(value) {
  var heading = this.getHeading();

  if (outputFormat == 'default')
    console.log('%s: %s', heading, value.toFixed(5));
  else if (outputFormat == 'csv')
    console.log('%s,%s', heading, value.toFixed(5));

  process.exit(0);
};

Benchmark.prototype.getHeading = function() {
  var conf = this.config;

  if (outputFormat == 'default') {
    return this._name + ' ' + Object.keys(conf).map(function(key) {
      return key + '=' + conf[key];
    }).join(' ');
  } else if (outputFormat == 'csv') {
    return this._name + ',' + Object.keys(conf).map(function(key) {
      return conf[key];
    }).join(',');
  }
};