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'use strict';
const common = require('../common.js');
const assert = require('assert');
const bench = common.createBenchmark(main, {
source: [
'array',
'arraybuffer',
'arraybuffer-middle',
'buffer',
'string',
'string-utf8',
'string-base64',
'object',
],
len: [100, 2048],
n: [8e5]
});
function main({ len, n, source }) {
const array = new Array(len).fill(42);
const arrayBuf = new ArrayBuffer(len);
const str = 'a'.repeat(len);
const buffer = Buffer.allocUnsafe(len);
const uint8array = new Uint8Array(len);
const obj = { length: null }; // Results in a new, empty Buffer
let i = 0;
switch (source) {
case 'array':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(array);
}
bench.end(n);
break;
case 'arraybuffer':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(arrayBuf);
}
bench.end(n);
break;
case 'arraybuffer-middle':
const offset = ~~(len / 4);
const length = ~~(len / 2);
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(arrayBuf, offset, length);
}
bench.end(n);
break;
case 'buffer':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(buffer);
}
bench.end(n);
break;
case 'uint8array':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(uint8array);
}
bench.end(n);
break;
case 'string':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(str);
}
bench.end(n);
break;
case 'string-utf8':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(str, 'utf8');
}
bench.end(n);
break;
case 'string-base64':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(str, 'base64');
}
bench.end(n);
break;
case 'object':
bench.start();
for (i = 0; i < n; i++) {
Buffer.from(obj);
}
bench.end(n);
break;
default:
assert.fail('Should not get here');
}
}