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Buffer.byteLength is important for speed because it is called whenever a new Buffer is created from a string. This commit optimizes Buffer.byteLength execution by: - moving base64 length calculation into JS-land, which is now much faster - remove redundant code and streamline the UTF8 length calculation It also adds a benchmark and better tests. PR-URL: https://github.com/nodejs/io.js/pull/1713 Reviewed-By: Trevor Norris <trev.norris@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
47 lines
1.9 KiB
JavaScript
47 lines
1.9 KiB
JavaScript
'use strict';
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var common = require('../common');
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var assert = require('assert');
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var Buffer = require('buffer').Buffer;
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// coerce values to string
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assert.equal(Buffer.byteLength(32, 'raw'), 2);
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assert.equal(Buffer.byteLength(NaN, 'utf8'), 3);
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assert.equal(Buffer.byteLength({}, 'raws'), 15);
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assert.equal(Buffer.byteLength(), 9);
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// special case: zero length string
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assert.equal(Buffer.byteLength('', 'ascii'), 0);
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assert.equal(Buffer.byteLength('', 'HeX'), 0);
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// utf8
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assert.equal(Buffer.byteLength('∑éllö wørl∂!', 'utf-8'), 19);
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assert.equal(Buffer.byteLength('κλμνξο', 'utf8'), 12);
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assert.equal(Buffer.byteLength('挵挶挷挸挹', 'utf-8'), 15);
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assert.equal(Buffer.byteLength('𠝹𠱓𠱸', 'UTF8'), 12);
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// without an encoding, utf8 should be assumed
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assert.equal(Buffer.byteLength('hey there'), 9);
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assert.equal(Buffer.byteLength('𠱸挶νξ#xx :)'), 17);
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assert.equal(Buffer.byteLength('hello world', ''), 11);
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// it should also be assumed with unrecognized encoding
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assert.equal(Buffer.byteLength('hello world', 'abc'), 11);
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assert.equal(Buffer.byteLength('ßœ∑≈', 'unkn0wn enc0ding'), 10);
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// base64
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assert.equal(Buffer.byteLength('aGVsbG8gd29ybGQ=', 'base64'), 11);
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assert.equal(Buffer.byteLength('bm9kZS5qcyByb2NrcyE=', 'base64'), 14);
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assert.equal(Buffer.byteLength('aGkk', 'base64'), 3);
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assert.equal(Buffer.byteLength('bHNrZGZsa3NqZmtsc2xrZmFqc2RsZmtqcw==',
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'base64'), 25);
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// special padding
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assert.equal(Buffer.byteLength('aaa=', 'base64'), 2);
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assert.equal(Buffer.byteLength('aaaa==', 'base64'), 3);
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assert.equal(Buffer.byteLength('Il était tué'), 14);
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assert.equal(Buffer.byteLength('Il était tué', 'utf8'), 14);
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assert.equal(Buffer.byteLength('Il était tué', 'ascii'), 12);
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assert.equal(Buffer.byteLength('Il était tué', 'binary'), 12);
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['ucs2', 'ucs-2', 'utf16le', 'utf-16le'].forEach(function(encoding) {
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assert.equal(24, Buffer.byteLength('Il était tué', encoding));
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});
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