benchmark: add blob benchmark

PR-URL: https://github.com/nodejs/node/pull/44990
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

benchmark/blob/blob.js

@@ -0,0 +1,30 @@
+'use strict';
+const common = require('../common.js');
+const { Blob } = require('buffer');
+
+const bench = common.createBenchmark(main, {
+  bytes: [128, 1024, 1024 ** 2],
+  n: [1e6],
+  operation: ['text', 'arrayBuffer']
+});
+
+async function run(n, bytes, operation) {
+  const buff = Buffer.allocUnsafe(bytes);
+  const source = new Blob(buff);
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    switch (operation) {
+      case 'text':
+        await source.text();
+        break;
+      case 'arrayBuffer':
+        await source.arrayBuffer();
+        break;
+    }
+  }
+  bench.end(n);
+}
+
+function main(conf) {
+  run(conf.n, conf.bytes, conf.operation).catch(console.log);
+}

test/benchmark/test-benchmark-blob.js

@@ -0,0 +1,7 @@
+'use strict';
+
+require('../common');
+
+const runBenchmark = require('../common/benchmark');
+
+runBenchmark('blob', { NODEJS_BENCHMARK_ZERO_ALLOWED: 1 });