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ChuckandClaude Opus 5.5
ddf5f085a5
The sports plugins cache whole season schedules: 53MB for MLB, 18MB for NHL, 17MB for NCAA baseball. On a Pi 4, orjson.loads of the MLB file takes ~1.8s with the GIL held, and every thread in the display service waits -- the stall watchdog caught the render thread frozen 0.5-1.3s with the interpreter itself blocked, right on these reads. When a season record expired, DiskCache.get paid that whole parse only to find the timestamp too old and throw the result away. CacheManager.set now writes timestamp and ttl ahead of the data, and DiskCache.get reads them from the first 256 bytes of the file, applying the same rule as before (a per-entry ttl wins over max_age; no limit means never stale). A record that is stale is refused without being parsed. Files in the old layout, and records from other writers, don't match the header and are parsed in full as before. Also: ESPN responses in the background data service and espn_dates are parsed with orjson when it is installed (src/common/json_body.py). The stdlib parser behind response.json() takes 3.1s on the MLB season against orjson's 1.8s, both with the GIL held. espn_dates imports it with a fallback, since plugins bundle copies of that module for older cores. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>