Webpack to Vite: Improving Speed and Performance

Описание и применение

Перенос проекта с Webpack на Vite сократил время сборки с нескольких минут до долей секунды, уменьшил размер бандла примерно на 40 % и ускорил HMR, улучшив цикл разработки и производительность в продакшене.

Задача

Build times and bundle sizes were growing too large for the team’s JavaScript project, causing slow development cycles and sluggish production performance.

Результат

The migration cut build times from minutes to seconds, reduced bundle size by ~40%, and made HMR instantaneous, leading to faster development and better production performance.

Рабочий процесс

• 1. Installed Vite and required plugins (vite-plugin-react, @vitejs/plugin-react-refresh).
• 2. Created a new vite.config.ts mirroring essential Webpack settings (alias, env variables).
• 3. Replaced Webpack entry points with Vite’s index.html and updated import paths.
• 4. Updated npm scripts: removed webpack‑dev and webpack‑build, added "vite" and "vite build".
• 5. Migrated CSS and asset handling to Vite’s native support (postcss, url imports).
• 6. Ran a full test suite to ensure functionality remained unchanged.
• 7. Deployed the Vite build to production and monitored bundle size and load times.

Доказательства

After the migration, a full rebuild that used to take 3–4 minutes now takes less than a second.

Источник

The gzipped bundle size dropped from ~2 MB to ~1.2 MB.

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Hot Module Replacement became instant and no longer required manual restarts.

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