feat: compile to bytecode

scripts/build.mjs

@@ -1,7 +1,7 @@
 // @ts-nocheck
 /* eslint-disable no-restricted-syntax */
 import swc from "@swc/core";
-import { execSync } from "child_process";
+import { execFileSync, execSync } from "child_process";
 import crypto from "crypto";
 import { build } from "esbuild";
 import globalPlugin from "esbuild-plugin-globals";
@@ -10,6 +10,7 @@ import { fileURLToPath } from "url";
 import yargs from "yargs-parser";
 
 import { printBuildSuccess } from "./util.mjs";
+import { readFile } from "fs/promises";
 
 /** @type string[] */
 const metroDeps = await (async () => {
@@ -121,6 +122,23 @@ export async function buildBundle(overrideConfig = {}) {
     const initialStartTime = performance.now();
     await build({ ...config, ...overrideConfig });
 
+    const paths = {
+        win32: 'win64-bin/hermesc.exe',
+        darwin: 'osx-bin/hermesc',
+        linux: 'linux64-bin/hermesc',
+    }
+
+    if (!(process.platform in paths))
+        throw new Error(`Unsupported platform: ${process.platform}`)
+
+    const sdksDir = './node_modules/react-native/sdks'
+    const binPath = `${sdksDir}/hermesc/${paths[process.platform]}`
+
+    execFileSync(binPath, ['-finline', '-strict', '-O', '-g1', '-reuse-prop-cache', '-optimized-eval', '-emit-binary', '-Wno-undefined-variable', '-out', config.outfile], {
+        input: await readFile(config.outfile),
+        stdio: 'pipe'
+    });
+
     return {
         config,
         context,

scripts/serve.mjs

@@ -27,8 +27,8 @@ export function serve(options) {
                     timeTook
                 );
 
-                res.writeHead(200, { "Content-Type": "application/javascript" });
-                res.end(await readFile(config.outfile, "utf-8"));
+                res.writeHead(200);
+                res.end(await readFile(config.outfile));
             } catch {
                 res.writeHead(500);
                 res.end();