Related issue:

• Performance issues related to schema cleaning #10285

A newcopy argument is added to_WalkCoreSchema, defaulting toTrue. In the relevant steps of schema cleaning, no copy is performed.

Flamegraph:

• Command:py-spy record -o k8s_v2_no_copy.json -f speedscope -- python k8s_v2.py
• Output file:k8s_v2_no_copy.json
• View withspeedscope.app

Time order:

Left heavy:

The left heavy schema clearly shows thatcollect_refs (the first handler function to be used withwalk_core_schema) takes most of the time, and the other ones now represents almost nothing.

Seems like ~1 second can be saved. Not bad, but not that great either. Perhaps dict copies aren't that expensive? Unsurprisingly, memory consumption is the same (~600MiB in the end):

• Command:memray run -o k8s_v2_no_copy.bin k8s_v2.py && memray flamegraph k8s_v2_no_copy.bin