[publish images] (+ add Object.hasOwn benchmark)

bench/snippets/object-hasown.mjs

@@ -0,0 +1,57 @@
+import { bench, run } from "../runner.mjs";
+
+const obj = { a: 1, b: 2, c: 3 };
+const objDeep = { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6, g: 7, h: 8 };
+const sym = Symbol("test");
+const objWithSymbol = { [sym]: 1, a: 2 };
+
+const objs = [
+  { f: 50 },
+  { f: 50, g: 70 },
+  { g: 50, f: 70 },
+  { h: 50, f: 70 },
+  { z: 50, f: 70 },
+  { k: 50, f: 70 },
+];
+
+bench("Object.hasOwn - hit", () => {
+  return Object.hasOwn(obj, "a");
+});
+
+bench("Object.hasOwn - miss", () => {
+  return Object.hasOwn(obj, "z");
+});
+
+bench("Object.hasOwn - symbol hit", () => {
+  return Object.hasOwn(objWithSymbol, sym);
+});
+
+bench("Object.hasOwn - symbol miss", () => {
+  return Object.hasOwn(objWithSymbol, Symbol("other"));
+});
+
+bench("Object.hasOwn - multiple shapes", () => {
+  let result = true;
+  for (let i = 0; i < objs.length; i++) {
+    result = Object.hasOwn(objs[i], "f") && result;
+  }
+  return result;
+});
+
+bench("Object.prototype.hasOwnProperty - hit", () => {
+  return obj.hasOwnProperty("a");
+});
+
+bench("Object.prototype.hasOwnProperty - miss", () => {
+  return obj.hasOwnProperty("z");
+});
+
+bench("in operator - hit", () => {
+  return "a" in obj;
+});
+
+bench("in operator - miss", () => {
+  return "z" in obj;
+});
+
+await run();