Summary

Rsbuild used to offer a performance.buildCache option, and it only worked with Babel loader cache and webpack cache.

This PR makes performance.buildCache work with Rspack's new experimental persistent cache. It is disabled by default because Rspack's persistent cache is not yet stable.

• Enable:

export default defineConfig({
  performance: {
    buildCache: true,
  },
});

Related Links

https://rspack.dev/config/experiments#persistent-cache

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

Documentation will be updated later.