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// Throughput benchmark
// creates a single hasher, then pushes a bunch of data through it
'use strict';
const common = require('../common.js');
const crypto = require('crypto');
const bench = common.createBenchmark(main, {
writes: [500],
algo: [ 'sha256', 'md5' ],
type: ['asc', 'utf', 'buf'],
out: ['hex', 'binary', 'buffer'],
len: [2, 1024, 102400, 1024 * 1024],
api: ['legacy', 'stream']
});
function main({ api, type, len, out, writes, algo }) {
if (api === 'stream' && /^v0\.[0-8]\./.test(process.version)) {
console.error('Crypto streams not available until v0.10');
// Use the legacy, just so that we can compare them.
api = 'legacy';
}
let message;
let encoding;
switch (type) {
case 'asc':
message = 'a'.repeat(len);
encoding = 'ascii';
break;
case 'utf':
message = 'ü'.repeat(len / 2);
encoding = 'utf8';
break;
case 'buf':
message = Buffer.alloc(len, 'b');
break;
default:
throw new Error(`unknown message type: ${type}`);
}
const fn = api === 'stream' ? streamWrite : legacyWrite;
bench.start();
fn(algo, message, encoding, writes, len, out);
}
function legacyWrite(algo, message, encoding, writes, len, outEnc) {
const written = writes * len;
const bits = written * 8;
const gbits = bits / (1024 * 1024 * 1024);
while (writes-- > 0) {
const h = crypto.createHash(algo);
h.update(message, encoding);
h.digest(outEnc);
}
bench.end(gbits);
}
function streamWrite(algo, message, encoding, writes, len, outEnc) {
const written = writes * len;
const bits = written * 8;
const gbits = bits / (1024 * 1024 * 1024);
while (writes-- > 0) {
const h = crypto.createHash(algo);
if (outEnc !== 'buffer')
h.setEncoding(outEnc);
h.write(message, encoding);
h.end();
h.read();
}
bench.end(gbits);
}
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