// test UDP send throughput with the multi buffer API against Buffer.concat 'use strict'; const common = require('../common.js'); const PORT = common.PORT; // `num` is the number of send requests to queue up each time. // Keep it reasonably high (>10) otherwise you're benchmarking the speed of // event loop cycles more than anything else. var bench = common.createBenchmark(main, { len: [64, 256, 512, 1024], num: [100], chunks: [1, 2, 4, 8], type: ['concat', 'multi'], dur: [5] }); var dur; var len; var num; var type; var chunk; var chunks; function main(conf) { dur = +conf.dur; len = +conf.len; num = +conf.num; type = conf.type; chunks = +conf.chunks; chunk = []; for (var i = 0; i < chunks; i++) { chunk.push(Buffer.allocUnsafe(Math.round(len / chunks))); } server(); } var dgram = require('dgram'); function server() { var sent = 0; var socket = dgram.createSocket('udp4'); var onsend = type === 'concat' ? onsendConcat : onsendMulti; function onsendConcat() { if (sent++ % num === 0) for (var i = 0; i < num; i++) { socket.send(Buffer.concat(chunk), PORT, '127.0.0.1', onsend); } } function onsendMulti() { if (sent++ % num === 0) for (var i = 0; i < num; i++) { socket.send(chunk, PORT, '127.0.0.1', onsend); } } socket.on('listening', function() { bench.start(); onsend(); setTimeout(function() { var bytes = sent * len; var gbits = (bytes * 8) / (1024 * 1024 * 1024); bench.end(gbits); process.exit(0); }, dur * 1000); }); socket.bind(PORT); }