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read() performance is improved most by switching from an array to a linked list for storing buffered data. However, other changes that also contribute include: making some hot functions inlinable, faster read() argument checking, and misc code rearrangement to avoid unnecessary code execution. PR-URL: https://github.com/nodejs/node/pull/7077 Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
32 lines
565 B
JavaScript
32 lines
565 B
JavaScript
'use strict';
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require('../common');
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var Readable = require('stream').Readable;
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var assert = require('assert');
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var s = new Readable({
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highWaterMark: 20,
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encoding: 'ascii'
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});
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var list = ['1', '2', '3', '4', '5', '6'];
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s._read = function(n) {
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var one = list.shift();
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if (!one) {
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s.push(null);
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} else {
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var two = list.shift();
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s.push(one);
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s.push(two);
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}
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};
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s.read(0);
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// ACTUALLY [1, 3, 5, 6, 4, 2]
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process.on('exit', function() {
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assert.deepStrictEqual(s._readableState.buffer.join(','), '1,2,3,4,5,6');
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console.log('ok');
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});
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