benchmark: add stream.pipe benchmarks

benchmark/streams/pipe-object-mode.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+const { Readable, Writable } = require('stream');
+
+const bench = common.createBenchmark(main, {
+  n: [5e6]
+});
+
+function main({ n }) {
+  const b = {};
+  const r = new Readable({ objectMode: true });
+  const w = new Writable({ objectMode: true });
+
+  var i = 0;
+
+  r._read = () => r.push(i++ === n ? null : b);
+  w._write = (data, enc, cb) => cb();
+
+  bench.start();
+
+  r.pipe(w);
+  w.on('finish', () => bench.end(n));
+}

benchmark/streams/pipe.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+const { Readable, Writable } = require('stream');
+
+const bench = common.createBenchmark(main, {
+  n: [5e6]
+});
+
+function main({ n }) {
+  const b = new Buffer(1024);
+  const r = new Readable();
+  const w = new Writable();
+
+  var i = 0;
+
+  r._read = () => r.push(i++ === n ? null : b);
+  w._write = (data, enc, cb) => cb();
+
+  bench.start();
+
+  r.pipe(w);
+  w.on('finish', () => bench.end(n));
+}