𝗕𝘂𝗻 𝘃𝘀 𝗩𝗶𝘁𝗲 (𝟮𝟬𝟮𝟲): 𝗪𝗵𝗶𝗰𝗵 𝗢𝗻𝗲 𝗗𝗼 𝗬𝗼𝘂 𝗡𝗲𝗲𝗱?

𝗕𝘂𝗻 𝘃𝘀 𝗩𝗶𝘁𝗲 (𝟮𝟬𝟮𝟲): 𝗪𝗵𝗶𝗰𝗵 𝗢𝗻𝗲 𝗗𝗼 𝗬𝗼𝘂 𝗡𝗲𝗲𝗱?

Stop asking which tool is faster.

Bun and Vite now do many of the same things. They both handle bundling and package workflows. But they solve different problems.

For most frontend apps, use both.

• Use Bun for installs and scripts.
• Use Vite for the dev server and production builds.

This setup is not a compromise. It gives you Bun speed for packages and Vite stability for your UI.

Vite 8 changed the race. It uses Rolldown. Rolldown is a Rust-based bundler. It makes builds faster. The speed gap between Bun and Vite is now smaller.

Use only Bun if you build:

• Backend APIs.
• CLI tools.
• Simple static sites.

Replacing Vite is a high risk. Vite has a huge plugin ecosystem. Its HMR is battle-tested. Bun HMR needs more testing for complex apps.

Do not trust blog post benchmarks. Measure your own app.

Check these five things:

• Cold install speed.
• Dev server startup.
• HMR edit loops.
• Production build time.
• Server bundle speed.

Switch your package manager to Bun first. It is easy to reverse. Keep Vite for your build pipeline. Only replace Vite after a canary branch proves it works for your app.

Source: https://dev.to/royce_fabbd83cb268312e928/bun-vs-vite-2026-build-speed-hmr-when-to-use-both-152g