mirror of
https://github.com/oxc-project/oxc.git
synced 2026-09-14 19:36:11 +08:00
overlookmotel
ea2880170a
Add benchmarks for source maps in `oxc-codegen`. 2 benchmarks: 1. Full end-to-end. 2. Without the actual sourcemap generation at the end. The 2nd is to measure the overhead that pushing to the sourcemap arrays adds while printing in isolation.
116 lines
4.5 KiB
TypeScript
116 lines
4.5 KiB
TypeScript
// Build configuration.
|
|
//
|
|
// 5 builds out of one source tree - the entry point, and the printer over the 2 build-time feature flags.
|
|
// The plugin order matters: `strip_ts` is a text transform, so it has to run before the plugins which parse.
|
|
|
|
import { defineConfig } from "tsdown";
|
|
import removeAssertsPlugin from "./tsdown_plugins/remove_asserts.ts";
|
|
import stripTsPlugin from "./tsdown_plugins/strip_ts.ts";
|
|
import unmapWritesPlugin from "./tsdown_plugins/unmap_writes.ts";
|
|
import constFunctionsPlugin from "./tsdown_plugins/const_functions.ts";
|
|
|
|
const isEnabled = (env: string | undefined) => env === "true" || env === "1";
|
|
|
|
// When run with `pnpm run build-dev`, generate a debug build with extra assertions.
|
|
// This is the build prepared by `pnpm run build-test` for conformance tests.
|
|
// It replaces the release build in `dist`, so rebuild with `pnpm run build` before benchmarking.
|
|
const DEBUG = isEnabled(process.env.DEBUG);
|
|
|
|
// When run with `pnpm run bench`, generate a build which honors the `skipSourcemapGeneration` option,
|
|
// so the benchmarks can measure the print pass without source map generation.
|
|
const BENCHMARKS = isEnabled(process.env.BENCHMARKS);
|
|
|
|
// Only remove assertions in release build. Debug builds keep `debugAssert` calls live.
|
|
const assertPlugins = DEBUG ? [] : [removeAssertsPlugin];
|
|
|
|
// Global constants defined at build time. See `src-js/globals.d.ts`.
|
|
// `DEBUG: false` lets the minifier remove the body of `debugAssert` and any other debug-only code.
|
|
const definedGlobals = {
|
|
DEBUG: DEBUG ? "true" : "false",
|
|
BENCHMARKS: BENCHMARKS ? "true" : "false",
|
|
};
|
|
|
|
// Base config.
|
|
// `platform: "node"` because the entry point loads the printer with `createRequire`.
|
|
const commonConfig = defineConfig({
|
|
platform: "node",
|
|
target: "node20",
|
|
outDir: "dist",
|
|
format: "esm",
|
|
unbundle: false,
|
|
hash: false,
|
|
fixedExtension: false,
|
|
// `scripts/build.ts` deletes `dist` before TSDown runs.
|
|
// This allows generating all 5 builds into the same directory.
|
|
clean: false,
|
|
plugins: [...assertPlugins],
|
|
inputOptions: {
|
|
// For plugins
|
|
experimental: { nativeMagicString: true },
|
|
},
|
|
});
|
|
|
|
// Minification options.
|
|
// Release builds are minified in full - that is what is published, and it is half the size.
|
|
// Debug builds keep names and whitespace, so `dist` stays readable while working on the printer.
|
|
const minifyConfig = DEBUG
|
|
? {
|
|
compress: { keepNames: { function: true, class: true } },
|
|
mangle: false,
|
|
codegen: { removeWhitespace: false },
|
|
}
|
|
: true;
|
|
|
|
// One printer build. The printer is built 4 times from `src-js/print/index.ts`,
|
|
// over 2 build-time feature flags (see `src-js/globals.d.ts`):
|
|
//
|
|
// - `SOURCEMAPS`: Source map support costs a little speed even when unused.
|
|
// - `TS`: TypeScript syntax support. JS-only builds lose all the TS field checks (via minifier dead-code removal)
|
|
// and the TS switch arms + printer functions (via `strip_ts.ts`).
|
|
//
|
|
// `src-js/index.ts` loads whichever build the caller's options call for.
|
|
//
|
|
// In builds without source maps, nothing reads the `node` argument the mapping writes take,
|
|
// so `unmap_writes` rewrites every `writeWithMap` / `writeWithMapNoLast` call, and the imports
|
|
// which bring them in, into the plain `write` / `writeNoLast` they become without it.
|
|
const printerConfig = (name: string, { sourcemaps, ts }: { sourcemaps: boolean; ts: boolean }) => ({
|
|
...commonConfig,
|
|
minify: minifyConfig,
|
|
// Only the entry point's types are published
|
|
dts: false,
|
|
entry: { [name]: "src-js/print/index.ts" },
|
|
define: {
|
|
...definedGlobals,
|
|
SOURCEMAPS: sourcemaps ? "true" : "false",
|
|
TS: ts ? "true" : "false",
|
|
},
|
|
plugins: [
|
|
// `strip_ts` is a text transform, so must run before the AST-based plugins
|
|
...(ts ? [] : [stripTsPlugin()]),
|
|
...(sourcemaps ? [] : [unmapWritesPlugin]),
|
|
constFunctionsPlugin,
|
|
...assertPlugins,
|
|
],
|
|
});
|
|
|
|
export default defineConfig([
|
|
// Entry point
|
|
{
|
|
...commonConfig,
|
|
entry: { index: "src-js/index.ts" },
|
|
minify: minifyConfig,
|
|
dts: true,
|
|
define: definedGlobals,
|
|
deps: {
|
|
// The printer builds are loaded at runtime, so must not be bundled in
|
|
neverBundle: ["./print_js.js", "./print_js_maps.js", "./print_ts.js", "./print_ts_maps.js"],
|
|
},
|
|
},
|
|
|
|
// Printers
|
|
printerConfig("print_js", { sourcemaps: false, ts: false }),
|
|
printerConfig("print_js_maps", { sourcemaps: true, ts: false }),
|
|
printerConfig("print_ts", { sourcemaps: false, ts: true }),
|
|
printerConfig("print_ts_maps", { sourcemaps: true, ts: true }),
|
|
]);
|