Daan MeijerandClaude Opus 5.5
9dc0a27bb4
A lease was only granted for a range with spooled chunks, and the prefetcher kept ranges ahead per active lease: once the spool ran dry a worker got none and slept 30 s, fewer ranges were leased, fewer prefetched. Three workers held one lease between them (~50k headers/s). A lease now takes a spooled range first, else the next planned one (leased ranges are fetched first; the stream waits). crypto.hash instead of createHash().update().digest() for file and release keys: same digests, ~2.5x faster (~4.6% of a worker's time). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>