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// test the speed of .pipe() with sockets
'use strict';
const common = require('../common.js');
const PORT = common.PORT;
const bench = common.createBenchmark(main, {
len: [64, 102400, 1024 * 1024 * 16],
type: ['utf', 'asc', 'buf'],
dur: [5]
});
var chunk;
var encoding;
function main({ dur, len, type }) {
switch (type) {
case 'buf':
chunk = Buffer.alloc(len, 'x');
break;
case 'utf':
encoding = 'utf8';
chunk = 'ü'.repeat(len / 2);
break;
case 'asc':
encoding = 'ascii';
chunk = 'x'.repeat(len);
break;
default:
throw new Error(`invalid type: ${type}`);
}
const reader = new Reader();
const writer = new Writer();
// the actual benchmark.
const server = net.createServer((socket) => {
reader.pipe(socket);
});
server.listen(PORT, () => {
const socket = net.connect(PORT);
socket.on('connect', () => {
bench.start();
socket.pipe(writer);
setTimeout(() => {
const bytes = writer.received;
const gbits = (bytes * 8) / (1024 * 1024 * 1024);
bench.end(gbits);
process.exit(0);
}, dur * 1000);
});
});
}
const net = require('net');
function Writer() {
this.received = 0;
this.writable = true;
}
Writer.prototype.write = function(chunk, encoding, cb) {
this.received += chunk.length;
if (typeof encoding === 'function')
encoding();
else if (typeof cb === 'function')
cb();
return true;
};
// doesn't matter, never emits anything.
Writer.prototype.on = function() {};
Writer.prototype.once = function() {};
Writer.prototype.emit = function() {};
Writer.prototype.prependListener = function() {};
function flow() {
const dest = this.dest;
const res = dest.write(chunk, encoding);
if (!res)
dest.once('drain', this.flow);
else
process.nextTick(this.flow);
}
function Reader() {
this.flow = flow.bind(this);
this.readable = true;
}
Reader.prototype.pipe = function(dest) {
this.dest = dest;
this.flow();
return dest;
};
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