perf: lazy load babel transform (#405)

Author: pi0

lib/jiti.cjs

@@ -1,16 +1,23 @@
 const { createRequire } = require("node:module");
 const _createJiti = require("../dist/jiti.cjs");
-const transform = require("../dist/babel.cjs");
 
 function onError(err) {
   throw err; /* ↓ Check stack trace ↓ */
 }
 
 const nativeImport = (id) => import(id);
 
+let _transform;
+function lazyTransform(...args) {
+  if (!_transform) {
+    _transform = require("../dist/babel.cjs");
+  }
+  return _transform(...args);
+}
+
 function createJiti(id, opts = {}) {
   if (!opts.transform) {
-    opts = { ...opts, transform };
+    opts = { ...opts, transform: lazyTransform };
   }
   return _createJiti(id, opts, {
     onError,

lib/jiti.mjs

@@ -1,16 +1,23 @@
 import { createRequire } from "node:module";
 import _createJiti from "../dist/jiti.cjs";
-import transform from "../dist/babel.cjs";
 
 function onError(err) {
   throw err; /* ↓ Check stack trace ↓ */
 }
 
 const nativeImport = (id) => import(id);
 
+let _transform;
+function lazyTransform(...args) {
+  if (!_transform) {
+    _transform = createRequire(import.meta.url)("../dist/babel.cjs");
+  }
+  return _transform(...args);
+}
+
 export function createJiti(id, opts = {}) {
   if (!opts.transform) {
-    opts = { ...opts, transform };
+    opts = { ...opts, transform: lazyTransform };
   }
   return _createJiti(id, opts, {
     onError,