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December 23, 2015 01:09
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can someone explain those results?
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| var log_2 = Math.log(2); | |
| suite('getTagLength', function() { | |
| set('mintime', 1000); | |
| bench('log(x) / log_2', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / log_2) | |
| }) | |
| bench('log(x) / log(2)', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / Math.log(2)) | |
| }) | |
| bench('log(x) / 0.69..', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / 0.6931471805599453) | |
| }) | |
| }) |
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| var log_2 = Math.log(2); | |
| suite('getTagLength', function() { | |
| set('mintime', 1000); | |
| bench('log(x) / log(2)', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / Math.log(2)) | |
| }) | |
| bench('log(x) / 0.69..', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / 0.6931471805599453) | |
| }) | |
| bench('log(x) / log_2', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / log_2) | |
| }) | |
| }) |
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| var log_2 = Math.log(2); | |
| suite('getTagLength', function() { | |
| set('mintime', 1000); | |
| bench('log(x) / 0.69..', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / 0.6931471805599453) | |
| }) | |
| bench('log(x) / log(2)', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / Math.log(2)) | |
| }) | |
| bench('log(x) / log_2', function() { | |
| return ~~(4 - Math.log(0x42 >> 4) / log_2) | |
| }) | |
| }) |
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| % node_modules/.bin/matcha bench/getTagLength.js | |
| getTagLength | |
| 93,236,704 op/s » log(x) / log_2 | |
| 140,360,674 op/s » log(x) / log(2) | |
| 139,952,917 op/s » log(x) / 0.69.. | |
| Suites: 1 | |
| Benches: 3 | |
| Elapsed: 6,668.10 ms |
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| % node_modules/.bin/matcha bench/getTagLength.js | |
| getTagLength | |
| 183,043,511 op/s » log(x) / log(2) | |
| 140,520,261 op/s » log(x) / 0.69.. | |
| 75,107,261 op/s » log(x) / log_2 | |
| Suites: 1 | |
| Benches: 3 | |
| Elapsed: 6,172.77 ms |
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| % node_modules/.bin/matcha bench/getTagLength.js | |
| getTagLength | |
| 163,974,921 op/s » log(x) / 0.69.. | |
| 122,013,489 op/s » log(x) / log(2) | |
| 64,790,185 op/s » log(x) / log_2 | |
| Suites: 1 | |
| Benches: 3 | |
| Elapsed: 7,422.99 ms |
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