test: new bench script

Author: pi0

package.json

@@ -48,6 +48,7 @@
     "register.cjs"
   ],
   "scripts": {
+    "bench": "node test/bench.mjs && deno -A test/bench.mjs && bun --bun test/bench.mjs",
     "build": "pnpm clean && NODE_ENV=production pnpm webpack",
     "clean": "rm -rf dist",
     "dev": "pnpm clean && pnpm webpack --watch",

test/bench.mjs

@@ -0,0 +1,42 @@
+import { createRequire } from "node:module";
+
+const runtime =
+  // eslint-disable-next-line unicorn/no-nested-ternary
+  "Bun" in globalThis ? "bun" : "Deno" in globalThis ? "deno" : "node";
+
+console.log("--------------------------------");
+
+console.log(
+  `> ${runtime} ${globalThis.Deno?.version.deno || globalThis.Bun?.version || process.version}`,
+);
+
+const require = createRequire(import.meta.url);
+
+const initialMem = process.memoryUsage().heapUsed;
+let lastMem = initialMem;
+const logMemory = (label) => {
+  const mem = process.memoryUsage().heapUsed;
+  console.log(
+    label,
+    "+" + ((mem - lastMem) / 1024 / 1024).toFixed(2) + " MB" + " (heap)",
+  );
+  lastMem = mem;
+};
+
+console.time("jiti:load");
+const createJiti = require("../lib/jiti.cjs");
+console.timeEnd("jiti:load");
+logMemory("jiti:load:");
+
+console.time("jiti:init");
+const jiti = createJiti(import.meta.url, {
+  moduleCache: false,
+  fsCache: false,
+});
+console.timeEnd("jiti:init");
+
+for (let i = 0; i < 4; i++) {
+  console.time("jiti:import:ts");
+  await jiti.import("../fixtures/typescript/test.ts");
+  console.timeEnd("jiti:import:ts");
+}