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'use strict';
const common = require('../common.js');
const bench = common.createBenchmark(main, {
method: ['swap16', 'swap32', 'htons', 'htonl'],
len: [4, 64, 512, 768, 1024, 1536, 2056, 4096, 8192],
n: [1e6]
});
// The htons and htonl methods below are used to benchmark the
// performance difference between doing the byteswap in pure
// javascript regardless of Buffer size as opposed to dropping
// down to the native layer for larger Buffer sizes.
Buffer.prototype.htons = function htons() {
if (this.length % 2 !== 0)
throw new RangeError();
for (var i = 0, n = 0; i < this.length; i += 2) {
n = this[i];
this[i] = this[i + 1];
this[i + 1] = n;
}
return this;
};
Buffer.prototype.htonl = function htonl() {
if (this.length % 2 !== 0)
throw new RangeError();
for (var i = 0, n = 0; i < this.length; i += 4) {
n = this[i];
this[i] = this[i + 3];
this[i + 3] = n;
n = this[i + 1];
this[i + 1] = this[i + 2];
this[i + 2] = n;
}
return this;
};
function createBuffer(len) {
const buf = Buffer.allocUnsafe(len);
for (var i = 1; i <= len; i++)
buf[i - 1] = i;
return buf;
}
function bufferSwap(n, buf, method) {
for (var i = 1; i <= n; i++)
buf[method]();
}
function main(conf) {
const method = conf.method;
const len = conf.len | 0;
const n = conf.n | 0;
const buf = createBuffer(len);
bench.start();
bufferSwap(n, buf, method);
bench.end(n);
}
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