Postprocess a Node heap snapshot to remove all WeakMap strong edges
to make it easier to trace the path from a suspected leaked object to the GC root.
npx heapdump-cleanup <input> <output>
The script reads the entire heapdump in memory for processing. The read and write are streamed and it works on top of the raw snapshot structure, so it only requires enough memory to keep the raw snapshot data in memory, but it may still choke on larger heapdumps.