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d4fcb23e38
Increase the performance and simplify the logic of Buffer#write{U}Int*
and Buffer#read{U}Int* methods by placing the byte manipulation code
directly inline.
Also improve the speed of buffer-write benchmarks by creating a new
call directly to each method by using Function() instead of calling by
buff[fn].
Signed-off-by: Trevor Norris <trev.norris@gmail.com>
70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
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var common = require('../common.js');
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var bench = common.createBenchmark(main, {
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noAssert: [false, true],
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buffer: ['fast', 'slow'],
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type: ['UInt8', 'UInt16LE', 'UInt16BE',
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'UInt32LE', 'UInt32BE',
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'Int8', 'Int16LE', 'Int16BE',
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'Int32LE', 'Int32BE',
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'FloatLE', 'FloatBE',
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'DoubleLE', 'DoubleBE'],
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millions: [1]
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});
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const INT8 = 0x7f;
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const INT16 = 0x7fff;
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const INT32 = 0x7fffffff;
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const UINT8 = (INT8 * 2) + 1;
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const UINT16 = (INT16 * 2) + 1;
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const UINT32 = INT32;
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var mod = {
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writeInt8: INT8,
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writeInt16BE: INT16,
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writeInt16LE: INT16,
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writeInt32BE: INT32,
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writeInt32LE: INT32,
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writeUInt8: UINT8,
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writeUInt16BE: UINT16,
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writeUInt16LE: UINT16,
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writeUInt32BE: UINT32,
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writeUInt32LE: UINT32
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};
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function main(conf) {
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var noAssert = conf.noAssert === 'true';
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var len = +conf.millions * 1e6;
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var clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
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var buff = new clazz(8);
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var fn = 'write' + conf.type;
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if (fn.match(/Int/))
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benchInt(buff, fn, len, noAssert);
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else
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benchFloat(buff, fn, len, noAssert);
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}
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function benchInt(buff, fn, len, noAssert) {
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var m = mod[fn];
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var testFunction = new Function('buff', [
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"for (var i = 0; i !== " + len + "; i++) {",
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" buff." + fn + "(i & " + m + ", 0, " + JSON.stringify(noAssert) + ");",
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"}"
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].join("\n"));
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bench.start();
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testFunction(buff);
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bench.end(len / 1e6);
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}
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function benchFloat(buff, fn, len, noAssert) {
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var testFunction = new Function('buff', [
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"for (var i = 0; i !== " + len + "; i++) {",
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" buff." + fn + "(i, 0, " + JSON.stringify(noAssert) + ");",
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"}"
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].join("\n"));
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bench.start();
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testFunction(buff);
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bench.end(len / 1e6);
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}
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