feat: add size script for output size measurement

Author: johnsoncodehk

package.json

@@ -49,6 +49,7 @@
 	"scripts": {
 		"prepublishOnly": "npm run check && npm run test",
 		"check": "tsslint --project tsconfig.json",
+		"size": "node ./size.js",
 		"build": "node ./build.js",
 		"test": "npm run build && vitest run",
 		"bench": "npm run build && node --jitless --expose-gc benchs/propagate.mjs",
@@ -57,9 +58,10 @@
 	"devDependencies": {
 		"@tsslint/cli": "latest",
 		"@tsslint/config": "latest",
+		"jest-extended": "latest",
 		"mitata": "latest",
+		"rolldown": "latest",
 		"typescript": "latest",
-		"vitest": "latest",
-		"jest-extended": "latest"
+		"vitest": "latest"
 	}
 }

pnpm-lock.yaml

@@ -0,0 +1,20 @@
+require('./build.js');
+
+const rolldown = require('rolldown');
+
+rolldown.build({
+	input: 'esm/index.mjs', output: { minify: true }, write: false
+}).then(built => {
+	console.log(`esm/index.mjs: ${(built.output[0].code.length / 1024).toFixed(2)} KB`);
+});
+rolldown.build({
+	input: 'esm/system.mjs', output: { minify: true }, write: false
+}).then(built => {
+	console.log(`esm/system.mjs: ${(built.output[0].code.length / 1024).toFixed(2)} KB`);
+});
+rolldown.build({ input: 'cjs/index.cjs', output: { minify: true }, write: false }).then(built => {
+	console.log(`cjs/index.cjs: ${(built.output[0].code.length / 1024).toFixed(2)} KB`);
+});
+rolldown.build({ input: 'cjs/system.cjs', output: { minify: true }, write: false }).then(built => {
+	console.log(`cjs/system.cjs: ${(built.output[0].code.length / 1024).toFixed(2)} KB`);
+});