85ab4a5f12
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
'use strict';
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var common = require('../common');
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var bench = common.createBenchmark(main, {
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encoding: ['utf8', 'base64'],
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len: [1, 2, 4, 16, 64, 256], // x16
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n: [5e6]
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});
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// 16 chars each
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var chars = [
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'hello brendan!!!', // 1 byte
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'ΰαβγδεζηθικλμνξο', // 2 bytes
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'挰挱挲挳挴挵挶挷挸挹挺挻挼挽挾挿', // 3 bytes
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'𠜎𠜱𠝹𠱓𠱸𠲖𠳏𠳕𠴕𠵼𠵿𠸎𠸏𠹷𠺝𠺢' // 4 bytes
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];
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function main(conf) {
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var n = conf.n | 0;
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var len = conf.len | 0;
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var encoding = conf.encoding;
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var strings = [];
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for (var string of chars) {
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// Strings must be built differently, depending on encoding
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var data = buildString(string, len);
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if (encoding === 'utf8') {
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strings.push(data);
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} else if (encoding === 'base64') {
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// Base64 strings will be much longer than their UTF8 counterparts
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strings.push(Buffer.from(data, 'utf8').toString('base64'));
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}
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}
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// Check the result to ensure it is *properly* optimized
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var results = strings.map(function(val) {
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return Buffer.byteLength(val, encoding);
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});
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bench.start();
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for (var i = 0; i < n; i++) {
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var index = n % strings.length;
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// Go!
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var r = Buffer.byteLength(strings[index], encoding);
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if (r !== results[index])
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throw new Error('incorrect return value');
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}
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bench.end(n);
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}
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function buildString(str, times) {
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if (times == 1) return str;
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return str + buildString(str, times - 1);
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}
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