Initial commit

bench.js

@@ -0,0 +1,60 @@
+import {
+    rangeGenerator,
+    rangeObjectProperty,
+    rangeClosure
+} from './range.js';
+
+const thousand = 1000;
+const million = 1000000;
+
+function benchmark(func) {
+    const iters = 100 * thousand;
+    // pre-heat jit
+    for (let i = 0; i < iters; i++) {
+        func();
+    }
+
+    let start = performance.now();
+    for (let i = 0; i < iters; i++) {
+        func();
+    }
+    let delta = (performance.now() - start) / iters;
+    console.log(`${delta * thousand} us per loop`);
+}
+
+function testFor() {
+    benchmark(() => {
+        let acc = 0;
+        for (let i = 0; i < thousand; i++) {
+            acc += i;
+        }
+        return acc;
+    });
+}
+
+function testOne(func) {
+    benchmark(() => {
+        let acc = 0;
+        for (let i of func(thousand)) {
+            acc += i;
+        }
+        return acc;
+    });
+}
+
+
+console.log('raw for loop');
+testFor();
+console.log('\n');
+
+console.log('rangeGenerator');
+testOne(rangeGenerator);
+console.log('\n');
+
+console.log('rangeObjectProperty');
+testOne(rangeObjectProperty);
+console.log('\n');
+
+console.log('rangeClosure');
+testOne(rangeClosure);
+console.log('\n');