Follow-up to the connection-exhaustion fix. Rather than routing large files to
plain uploads (which kept STORAGE dedup but gave up delta's re-upload bandwidth
savings), keep delta for every file >= 8 MB and instead cap each worker's
concurrent connections so a few large files uploading at once can't blow past
the browser's ~6-per-host budget and starve the small-file plain uploads.
- deltaWorker.js: serialize negotiate (at most one in flight per worker) and
drop chunk-PUT concurrency 2 -> 1, so each worker holds ~2 connections max.
- deltaUpload.ts: revert the 64 MB threshold back to 8 MB — every large file
gets sub-file dedup again. (Storage dedup was never affected: BLAKE3 + CDC +
ref-counting run server-side for plain and delta uploads alike.)
With main upload concurrency at 2, total in-flight upload connections stay <= ~4.
npm run check: clean, 58 tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
DioCrafts
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