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import { transform as _transform, initialize } from "esbuild-wasm";
import initSwc, { transformSync as transformSyncSWC } from "@swc/wasm-web";
import { Bun } from "./api";
export async function start() {
await initialize({
worker: false,
wasmURL: "/node_modules/esbuild-wasm/esbuild.wasm",
});
await Bun.init("/bun-wasm.wasm");
await initSwc("/node_modules/@swc/wasm-web/wasm_bg.wasm");
}
const swcOptions = {
sourceMaps: false,
inlineSourcesContent: false,
jsc: {
target: "es2022",
parser: {
jsx: true,
syntax: "typescript",
tsx: false,
decorators: false,
dynamicImport: false,
},
},
};
export async function transform(contents, file) {
var result: any = {
timings: {
esbuild: 0,
bun: 0,
swc: 0,
},
};
result.timings.esbuild = performance.now();
result.esbuild = await _transform(contents, {
sourcefile: file,
loader: file.substring(file.lastIndexOf(".") + 1),
});
result.timings.esbuild = performance.now() - result.timings.esbuild;
result.timings.bun = performance.now();
result.bun = Bun.transformSync(contents, file);
result.timings.bun = performance.now() - result.timings.bun;
if (file.substring(file.lastIndexOf(".") + 1) === "tsx") {
swcOptions.jsc.parser.tsx = true;
swcOptions.jsc.parser.syntax = "typescript";
} else if (file.substring(file.lastIndexOf(".") + 1) === "jsx") {
swcOptions.jsc.parser.tsx = false;
swcOptions.jsc.parser.jsx = true;
swcOptions.jsc.parser.syntax = "typescript";
} else {
swcOptions.jsc.parser.tsx = false;
swcOptions.jsc.parser.jsx = false;
swcOptions.jsc.parser.syntax = "javascript";
}
result.timings.swc = performance.now();
result.swc = transformSyncSWC(contents, swcOptions as any);
result.timings.swc = performance.now() - result.timings.swc;
console.log("esbuild:", result.timings.esbuild, "ms");
console.log("Bun:", result.timings.bun, "ms");
console.log("SWC:", result.timings.swc, "ms");
return result;
}
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