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benchmark/webstreams/js_transfer.js

@@ -0,0 +1,52 @@
+'use strict';
+
+const common = require('../common.js');
+
+const { MessageChannel } = require('worker_threads');
+const { WritableStream, TransformStream, ReadableStream } = require('stream/web');
+
+const bench = common.createBenchmark(main, {
+  payload: ['WritableStream', 'ReadableStream', 'TransformStream'],
+  n: [1e4],
+});
+
+function main({ n, payload: payloadType }) {
+  let createPayload;
+  let messages = 0;
+
+  switch (payloadType) {
+    case 'WritableStream':
+      createPayload = () => new WritableStream();
+      break;
+    case 'ReadableStream':
+      createPayload = () => new ReadableStream();
+      break;
+    case 'TransformStream':
+      createPayload = () => new TransformStream();
+      break;
+    default:
+      throw new Error('Unsupported payload type');
+  }
+
+  const { port1, port2 } = new MessageChannel();
+
+  port2.onmessage = onMessage;
+
+  function onMessage() {
+    if (messages++ === n) {
+      bench.end(n);
+      port1.close();
+    } else {
+      send();
+    }
+  }
+
+  function send() {
+    const stream = createPayload();
+
+    port1.postMessage(stream, [stream]);
+  }
+
+  bench.start();
+  send();
+}