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Exports re-encode on every request #290
Description
Location: stems.py:get_mixdown
Severity: LOW
Identical mixdown params re-run the full ffmpeg graph each time. Fine for desktop; on a shared server repeated downloads of the same mix burn CPU. A keyed cache (params hash → file, LRU) is a cheap server-mode win. Low priority.
From the health report. Part of #274 (Phase 3 — Performance).
Activity
perf(api): cache mixdown renders (#311)