benchmark: include webstreams benchmark

Signed-off-by: RafaelGSS <rafael.nunu@hotmail.com>

benchmark/webstreams/creation.js

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+'use strict';
+const common = require('../common.js');
+const {
+  ReadableStream,
+  TransformStream,
+  WritableStream,
+} = require('node:stream/web');
+
+const bench = common.createBenchmark(main, {
+  n: [50e3],
+  kind: ['ReadableStream', 'TransformStream', 'WritableStream']
+});
+
+function main({ n, kind }) {
+  switch (kind) {
+    case 'ReadableStream':
+      new ReadableStream({});
+      new ReadableStream();
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        new ReadableStream().cancel();
+      bench.end(n);
+      break;
+    case 'WritableStream':
+      new WritableStream({});
+      new WritableStream();
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        new WritableStream();
+      bench.end(n);
+      break;
+    case 'TransformStream':
+      new TransformStream({});
+      new TransformStream();
+
+      bench.start();
+      for (let i = 0; i < n; ++i)
+        new TransformStream();
+      bench.end(n);
+      break;
+    default:
+      throw new Error('Invalid kind');
+  }
+}

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: [5e6],
+});
+
+
+async function main({ n }) {
+  const b = Buffer.alloc(1024);
+  let i = 0;
+  const rs = new ReadableStream({
+    pull: function(controller) {
+      if (i++ === n) {
+        controller.enqueue(b);
+      } else {
+        controller.close();
+      }
+    }
+  });
+  const ws = new WritableStream({
+    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;
+  for await (const chunk of rs) {
+    x += chunk;
+    if (x > n) {
+      break;
+    }
+  }
+
+  bench.start();
+  // Use x to ensure V8 does not optimize away the loop as a noop.
+  console.assert(x);
+  bench.end(n);
+}