Speed up scriptc builds

README.md

@@ -8,7 +8,7 @@ scriptc is experimental and targets macOS, Linux, Windows, and WebAssembly via W
 
 ## Installation
 
-The compiler requires Node.js 20 or newer and clang. The executables it produces do not require Node.
+The compiler requires Node.js 24 or newer and clang. The executables it produces do not require Node.
 
 ```console
 $ npm install -g scriptc

packages/cli/package.json

@@ -11,13 +11,13 @@
   },
   "type": "module",
   "bin": {
-    "scriptc": "dist/main.js"
+    "scriptc": "dist/bootstrap.js"
   },
   "files": [
     "dist"
   ],
   "engines": {
-    "node": ">=20"
+    "node": ">=24"
   },
   "scripts": {
     "build": "node ../../node_modules/typescript/bin/tsc -p tsconfig.json"

packages/cli/src/bootstrap.ts

@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+
+import { enableCompileCache } from "node:module";
+
+// Node 24 can persist V8's compiled module bytecode. scriptc's CLI imports
+// the compiler and its lowering/backend graph before handling any command, so
+// enabling this in the tiny bootstrap avoids reparsing that graph on every
+// edit/build invocation.
+try {
+  enableCompileCache();
+} catch {
+  // Bytecode caching is an optimization boundary. A read-only temp directory
+  // must never prevent the compiler from running.
+}
+
+await import("./main.js");

packages/cli/src/main.ts

@@ -1,4 +1,3 @@
-#!/usr/bin/env node
 import { spawn } from "node:child_process";
 import { existsSync, readFileSync, rmSync, statSync } from "node:fs";
 import { basename, dirname, join, resolve } from "node:path";