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benchmark/webstreams/creation.js

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+'use strict';
+const common = require('../common.js');
+const {
+  ReadableStream,
+  ReadableStreamDefaultReader,
+  ReadableStreamBYOBReader,
+  TransformStream,
+  WritableStream,
+} = require('node:stream/web');
+const assert = require('assert');
+
+const bench = common.createBenchmark(main, {
+  n: [50e3],
+  kind: [
+    'ReadableStream',
+    'TransformStream',
+    'WritableStream',
+
+    'ReadableStreamDefaultReader',
+    'ReadableStreamBYOBReader',
+
+    'ReadableStream.tee',
+  ],
+});
+
+let readableStream;
+let transformStream;
+let writableStream;
+let readableStreamDefaultReader;
+let readableStreamBYOBReader;
+let teeResult;
+
+function main({ n, kind }) {
+  switch (kind) {
+    case 'ReadableStream':
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        readableStream = new ReadableStream();
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(readableStream);
+      break;
+    case 'WritableStream':
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        writableStream = new WritableStream();
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(writableStream);
+      break;
+    case 'TransformStream':
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        transformStream = new TransformStream();
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(transformStream);
+      break;
+    case 'ReadableStreamDefaultReader': {
+      const readers = Array.from({ length: n }, () => new ReadableStream());
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        readableStreamDefaultReader = new ReadableStreamDefaultReader(readers[i]);
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(readableStreamDefaultReader);
+      break;
+    }
+    case 'ReadableStreamBYOBReader': {
+      const readers = Array.from({ length: n }, () => new ReadableStream({ type: 'bytes' }));
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        readableStreamBYOBReader = new ReadableStreamBYOBReader(readers[i]);
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(readableStreamBYOBReader);
+      break;
+    }
+    case 'ReadableStream.tee': {
+      const streams = Array.from({ length: n }, () => new ReadableStream());
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        teeResult = streams[i].tee();
+      bench.end(n);
+
+      // Avoid V8 deadcode (elimination)
+      assert.ok(teeResult);
+      break;
+    }
+    default:
+      throw new Error('Invalid kind');
+  }
+}

benchmark/webstreams/js_transfer.js

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+'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();
+}

benchmark/webstreams/pipe-to.js

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+'use strict';
+const common = require('../common.js');
+const {
+  ReadableStream,
+  WritableStream,
+} = require('node:stream/web');
+
+const bench = common.createBenchmark(main, {
+  n: [5e5],
+  highWaterMarkR: [512, 1024, 2048, 4096],
+  highWaterMarkW: [512, 1024, 2048, 4096],
+});
+
+
+async function main({ n, highWaterMarkR, highWaterMarkW }) {
+  const b = Buffer.alloc(1024);
+  let i = 0;
+  const rs = new ReadableStream({
+    highWaterMark: highWaterMarkR,
+    pull: function(controller) {
+      if (i++ < n) {
+        controller.enqueue(b);
+      } else {
+        controller.close();
+      }
+    },
+  });
+  const ws = new WritableStream({
+    highWaterMark: highWaterMarkW,
+    write(chunk, controller) {},
+    close() { bench.end(n); },
+  });
+
+  bench.start();
+  rs.pipeTo(ws);
+}

benchmark/webstreams/readable-async-iterator.js

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+'use strict';
+const common = require('../common.js');
+const {
+  ReadableStream,
+} = require('node:stream/web');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+});
+
+
+async function main({ n }) {
+  const rs = new ReadableStream({
+    pull: function(controller) {
+      controller.enqueue(1);
+    },
+  });
+
+  let x = 0;
+
+  bench.start();
+  for await (const chunk of rs) {
+    x += chunk;
+    if (x > n) {
+      break;
+    }
+  }
+  // Use x to ensure V8 does not optimize away the loop as a noop.
+  console.assert(x);
+  bench.end(n);
+}

benchmark/webstreams/readable-read.js

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+'use strict';
+const common = require('../common.js');
+const { ReadableStream } = require('node:stream/web');
+
+const bench = common.createBenchmark(main, {
+  n: [1e5],
+  type: ['normal', 'byob'],
+});
+
+async function main({ n, type }) {
+  switch (type) {
+    case 'normal': {
+      const rs = new ReadableStream({
+        pull: function(controller) {
+          controller.enqueue('a');
+        },
+      });
+      const reader = rs.getReader();
+      let x = null;
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        const { value } = await reader.read();
+        x = value;
+      }
+      bench.end(n);
+      console.assert(x);
+      break;
+    }
+    case 'byob': {
+      const encode = new TextEncoder();
+      const rs = new ReadableStream({
+        type: 'bytes',
+        pull: function(controller) {
+          controller.enqueue(encode.encode('a'));
+        },
+      });
+      const reader = rs.getReader({ mode: 'byob' });
+      let x = null;
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        const { value } = await reader.read(new Uint8Array(1));
+        x = value;
+      }
+      bench.end(n);
+      console.assert(x);
+      break;
+    }
+  }
+}