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nodejs/benchmark/buffers/buffer-read.js
Nick Apperson d4fcb23e38 buffer: improve {read,write}{U}Int* methods
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>
2014-04-01 17:31:28 -07:00

32 lines
885 B
JavaScript

var common = require('../common.js');
var bench = common.createBenchmark(main, {
noAssert: [false, true],
buffer: ['fast', 'slow'],
type: ['UInt8', 'UInt16LE', 'UInt16BE',
'UInt32LE', 'UInt32BE',
'Int8', 'Int16LE', 'Int16BE',
'Int32LE', 'Int32BE',
'FloatLE', 'FloatBE',
'DoubleLE', 'DoubleBE'],
millions: [1]
});
function main(conf) {
var noAssert = conf.noAssert === 'true';
var len = +conf.millions * 1e6;
var clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
var buff = new clazz(8);
var fn = 'read' + conf.type;
buff.writeDoubleLE(0, 0, noAssert);
var testFunction = new Function('buff', [
"for (var i = 0; i !== " + len + "; i++) {",
" buff." + fn + "(0, " + JSON.stringify(noAssert) + ");",
"}"
].join("\n"));
bench.start();
testFunction(buff);
bench.end(len / 1e6);
}