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buffer-write.js
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123 lines (112 loc) · 2.21 KB
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'use strict';
const common = require('../common.js');
const types = [
'BigUInt64LE',
'BigUInt64BE',
'BigInt64LE',
'BigInt64BE',
'UInt8',
'UInt16LE',
'UInt16BE',
'UInt32LE',
'UInt32BE',
'UIntLE',
'UIntBE',
'Int8',
'Int16LE',
'Int16BE',
'Int32LE',
'Int32BE',
'IntLE',
'IntBE',
'FloatLE',
'FloatBE',
'DoubleLE',
'DoubleBE',
];
const bench = common.createBenchmark(main, {
buffer: ['fast'],
type: types,
n: [1e6],
});
const INT8 = 0x7f;
const INT16 = 0x7fff;
const INT32 = 0x7fffffff;
const INT48 = 0x7fffffffffff;
const INT64 = 0x7fffffffffffffffn;
const UINT8 = 0xff;
const UINT16 = 0xffff;
const UINT32 = 0xffffffff;
const UINT64 = 0xffffffffffffffffn;
const mod = {
writeBigInt64BE: INT64,
writeBigInt64LE: INT64,
writeBigUInt64BE: UINT64,
writeBigUInt64LE: UINT64,
writeInt8: INT8,
writeInt16BE: INT16,
writeInt16LE: INT16,
writeInt32BE: INT32,
writeInt32LE: INT32,
writeUInt8: UINT8,
writeUInt16BE: UINT16,
writeUInt16LE: UINT16,
writeUInt32BE: UINT32,
writeUInt32LE: UINT32,
writeUIntLE: INT8,
writeUIntBE: INT16,
writeIntLE: INT32,
writeIntBE: INT48,
};
const byteLength = {
writeUIntLE: 1,
writeUIntBE: 2,
writeIntLE: 4,
writeIntBE: 6,
};
function main({ n, buf, type }) {
const buff = buf === 'fast' ?
Buffer.alloc(8) :
require('buffer').SlowBuffer(8);
const fn = `write${type}`;
if (!/\d/.test(fn))
benchSpecialInt(buff, fn, n);
else if (/BigU?Int/.test(fn))
benchBigInt(buff, fn, BigInt(n));
else if (/Int/.test(fn))
benchInt(buff, fn, n);
else
benchFloat(buff, fn, n);
}
function benchBigInt(buff, fn, n) {
const m = mod[fn];
bench.start();
for (let i = 0n; i !== n; i++) {
buff[fn](i & m, 0);
}
bench.end(Number(n));
}
function benchInt(buff, fn, n) {
const m = mod[fn];
bench.start();
for (let i = 0; i !== n; i++) {
buff[fn](i & m, 0);
}
bench.end(n);
}
function benchSpecialInt(buff, fn, n) {
const m = mod[fn];
const byte = byteLength[fn];
bench.start();
for (let i = 0; i !== n; i++) {
buff[fn](i & m, 0, byte);
}
bench.end(n);
}
function benchFloat(buff, fn, n) {
bench.start();
for (let i = 0; i !== n; i++) {
buff[fn](i, 0);
}
bench.end(n);
}