Commits
Click on a commit to change the comparison rangeperf: reduce lock contention in on_inserted_executed_block
Move expensive insert_state operation outside the write lock to reduce
lock contention. Previously the write lock was held for 10-25ms during
insert_state, blocking get_cache_for reads.
Now the pattern is:
1. Brief lock to check parent hash and extract cache data
2. Expensive insert_state done OUTSIDE the lock
3. Brief lock for atomic swap with race-safety guard
This matches the pattern already used in save_cache (prewarm.rs).