https://github.com/sooniter/rspack-rollup-treeshake-repro

https://github.com/sooniter/rspack-rollup-treeshake-repro

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/sooniter/rspack-rollup-treeshake-repro
• Owner: SoonIter
• Created: 2024-11-20T08:42:09.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2024-11-20T09:12:12.000Z (about 1 month ago)
• Last Synced: 2024-11-20T10:45:27.200Z (about 1 month ago)
• Language: TypeScript
• Size: 41 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# rspack rollup compare

DCE analysis in one big esm file, compared with rollup

```ts

// node_modules/@aibee/crc-bmap/lib/bmap.esm.js:9565

var isOnline = process.env.CRC_BMAP_MODE === 'online';

var ParkingTypeIconMap3;

if (isOnline) {

  ParkingTypeIconMap3 = (init_online(), __toCommonJS(online_exports))

    .ParkingTypeIconMap;

} else {

  ParkingTypeIconMap3 = (init_offline(), __toCommonJS(offline_exports))

    .ParkingTypeIconMap;

}

```

```ts

  source: {

    define: {

      'process.env.CRC_BMAP_MODE': JSON.stringify('online'),

    },

  },

```

```sh

ni

npx rsbuild build

npx vite build

```

## Result

rsbuild 3875kb > vite(rollup) 812kb

rsbuild

```sh

ready   Built in 0.95 s (web)

  File (web)                                  Size         Gzip

  dist-rsbuild/index.html                     0.31 kB      0.22 kB

  dist-rsbuild/static/js/index.f63e9bd1.js    1.8 kB       0.90 kB

  dist-rsbuild/static/js/698.df5bb1bd.js      3875.7 kB    1683.1 kB

  Total: 3877.8 kB (gzip: 1684.2 kB)

```

vite(rollup)

```sh

vite v4.4.5 building for production...

✓ 1449 modules transformed.

dist/index.html            0.45 kB │ gzip:   0.28 kB

dist/index.js              0.77 kB │ gzip:   0.44 kB

dist/chunks/crc-bmap.js  812.95 kB │ gzip: 220.61 kB

✓ built in 3.79s

```