benchmark: add more cases to Readable.from

Author: rluvaton

benchmark/streams/readable-from.js

@@ -5,15 +5,48 @@ const Readable = require('stream').Readable;
 
 const bench = common.createBenchmark(main, {
   n: [1e7],
+  type: ['array', 'sync-generator', 'async-generator'],
 });
 
-async function main({ n }) {
-  const arr = [];
-  for (let i = 0; i < n; i++) {
-    arr.push(`${i}`);
+async function main({ n, type }) {
+  let fromArg;
+
+  switch (type) {
+    case 'array': {
+      fromArg = [];
+      for (let i = 0; i < n; i++) {
+        fromArg.push(`${i}`);
+      }
+
+      break;
+    }
+
+    case 'sync-generator': {
+      fromArg = (function* () {
+        for (let i = 0; i < n; i++) {
+          yield `${i}`;
+        }
+      })();
+
+      break;
+    }
+
+    case 'async-generator': {
+      fromArg = (async function* () {
+        for (let i = 0; i < n; i++) {
+          yield `${i}`;
+        }
+      })();
+
+      break;
+    }
+
+    default: {
+      throw new Error(`Unknown type: ${type}`);
+    }
   }
 
-  const s = new Readable.from(arr);
+  const s = new Readable.from(fromArg);
 
   bench.start();
   s.on('data', (data) => {