next.js

43dc6643 - Perf: Move chunkloading instrumentation to separate function (#91382)

Perf: Move chunkloading instrumentation to separate function (#91382) ## What? The chunkloading instrumentation causes a GC root because of writing to `globalThis.__next_require__` / `globalThis.__next_chunk_load__`. Splitting it into a separate function reduces the scope being retained in memory. Switch onHeaders to use for loop which is faster.