next.js

a01f8255 - Add a mode to next build to make it easier to debug memory issues (#63869)

Add a mode to next build to make it easier to debug memory issues (#63869) This PR adds a `--experimental-debug-memory-usage` flag to `next build` to make it easier to debug memory performance. This mode does the following things: - Periodically prints the current memory usage of the process - Records garbage collection events and warns about long running GC events - Kills the process if it detects GC thrashing near heap limit - Automatically takes a heap snapshot if heap usage rises above 70% of the total heap - Automatically takes a heap snapshot if the process is close to running out of memory - Prints a report at the end of the build with information about peak memory usage and time spent in garbage collection --------- Co-authored-by: JJ Kasper <jj@jjsweb.site>