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benchmark: add benchmark for buf.compare() #5441

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benchmark: add benchmark for buf.compare() #5441

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c77ae0d
benchmark: add benchmark for buf.compare()
Trott Feb 26, 2016
1c45f57
fixup: constify, force optimization
Trott Feb 26, 2016
e85b204
fixup: parameter typo
Trott Feb 26, 2016
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29 changes: 29 additions & 0 deletions benchmark/buffers/buffer-compare-instance-method.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,29 @@
'use strict';
const common = require('../common.js');
const v8 = require('v8');

const bench = common.createBenchmark(main, {
size: [16, 512, 1024, 4096, 16386],
millions: [1]
});

function main(conf) {
const iter = (conf.millions >>> 0) * 1e6;
const size = (conf.size >>> 0);
const b0 = new Buffer(size).fill('a');
const b1 = new Buffer(size).fill('a');

b1[size - 1] = 'b'.charCodeAt(0);

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@mscdex mscdex Feb 26, 2016

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Please insert code to force optimization of b0.compare before starting the benchmark. Take a look at some of the other (e.g. path) benchmarks to see how to do this.

// Force optimization before starting the benchmark
b0.compare(b1);
v8.setFlagsFromString('--allow_natives_syntax');
eval('%OptimizeFunctionOnNextCall(b0.compare)');
b0.compare(b1);

bench.start();
for (var i = 0; i < iter; i++) {
b0.compare(b1);
}
bench.end(iter / 1e6);
}