Sarab singh

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Next.js 13.4.8 includes improvements for compiler performance and various bug fixes. On Vercel​.com, this led to 1.5x faster local server startup and 54% faster updates when making changes (HMR / React Fast Refresh). Here are the changes we've made to improve performance ↓ ◆ Doing less work by caching or minimizing slow operations ◆ Optimizing expensive file system operations ◆ More incrementally traversing trees during compilation While these updates are more about the underlying tools like bundlers and compilers, we thought it would be interesting to share some of the work we’ve done. For example, to improve the local server startup (next dev) we’ve: ◆ Improved the traversal of the client / server graph, removing 100ms ◆ Moved unnecessary blocking synchronous calls to be lazy, removing 70ms ◆ Reduced initial compilation to only need either pages or app routes instead of both, removing up to 500ms To improve HMR / React Fast Refresh, we’ve: ◆ Added a shared cache for file system calls between different compilation phases ◆ Optimized file resolution for deeply nested directories, improving cold compilation by 30% ◆ Improved revalidation heuristic to prevent blocking the main thread, removed 1-2s on large pages We’ve also added default configurations for popular libraries with `modularizeImports`. This ensures you don’t accidentally try to reload thousands of additional modules, typically found with icon libraries. These performance improvements and various bug fixes are available today in 13.4.8. Our current focus remains optimizing performance and reliability, so expect more updates like this in the next release. github.com/vercel/next.js/re…