add bench

collections/sliding_windows_bench.ts

@@ -0,0 +1,28 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { slidingWindows } from "./sliding_windows.ts";
+import { slidingWindows as unstableSlidingWindows } from "./unstable_sliding_windows.ts";
+
+const arraySize = [10, 100, 1_000, 10_000, 100_000, 1_000_000];
+
+for (const len of arraySize) {
+  const array = Array.from({ length: len }, (_, i) => i);
+  const group = `${len} elements`;
+  const size = 7;
+
+  Deno.bench({
+    name: "slidingWindows",
+    group,
+    fn: () => {
+      slidingWindows(array, size);
+    },
+  });
+
+  Deno.bench({
+    name: "(unstable) slidingWindows",
+    group,
+    baseline: true,
+    fn: () => {
+      unstableSlidingWindows(array, size);
+    },
+  });
+}

collections/unstable_sliding_windows.ts

@@ -74,11 +74,15 @@ export function slidingWindows<T>(
   options: SlidingWindowsOptions = {},
 ): T[][] {
   const { step = 1, partial = false } = options;
-  if(!Number.isInteger(size) || size <= 0) {
-    throw new RangeError(`Cannot create sliding windows: size must be a positive integer, current value is ${size}`)
+  if (!Number.isInteger(size) || size <= 0) {
+    throw new RangeError(
+      `Cannot create sliding windows: size must be a positive integer, current value is ${size}`,
+    );
   }
-  if(!Number.isInteger(step) || step <= 0) {
-    throw new RangeError(`Cannot create sliding windows: step must be a positive integer, current value is ${step}`)
+  if (!Number.isInteger(step) || step <= 0) {
+    throw new RangeError(
+      `Cannot create sliding windows: step must be a positive integer, current value is ${step}`,
+    );
   }
   const array = Array.isArray(iterable) ? iterable : Array.from(iterable);
   const len = array.length;