2 Commits

Include renames

Author	SHA1	Message	Date
openhands	f81b114b69	perf(cache): single-flight avatar renders, cacheable public reads, cheap row counts ... Three separate things that were each costing more than they needed to on the hot path. - Single-flight avatar renders. The disk cache was checked first and a miss went straight to the upstream, with nothing shared between callers, so a page requesting dozens of avatars at once turned N concurrent requests for one figure into N renders. A render is the most expensive operation this app does, and the duplication happened exactly when the cache had nothing to offer. Eight concurrent requests now cause one render instead of eight. The map lives on globalThis because Next can evaluate the module more than once per process, and two copies would each start their own render. - Let public read-only routes be cached by a shared cache. Every JSON response was `cache-control: no-store`, so a CDN in front of the app could not answer any of it and every request reached the origin. publicCacheControl() opts a route in with s-maxage and stale-while-revalidate, using the same TTL as the server-side cache so the two layers cannot disagree. The default stays no-store: most routes here are personalised, admin-only or auth-dependent. /api/badges/leaderboard is deliberately left alone because it returns per-viewer rank entries to signed-in callers. Note this only takes effect once a cache rule exists for /api/* at the CDN, or the explicit `cache: "no-store"` is dropped from the client fetches (24 files do that today, including the /api/online poll). The headers alone are inert until one of those happens. - Take the homepage row counts from the storage engine estimate instead of COUNT(*), which walks an index and gets slower as the tables grow. A missing or zero estimate falls back to the exact count rather than ever showing a wrong zero. The online count stays exact: it is an indexed read over a small subset and a few seconds of drift reads as broken rather than approximate. The counters move into one module because the homepage and the boot warm-up populate the same cache keys, so two implementations would race to write different values into the same entry. 3223 tests pass.	2026-09-25 18:42:23 +02:00
openhands	203399aab7	fix(cache): true LRU, stale-while-revalidate and cross-process invalidation ... The in-process cache was a FIFO of 500 entries that was never touched on a read, so a key polled on every request could be evicted by an unrelated burst of dynamic keys. That looked exactly like the cache being cleared at random, and it is what made the site fall back to the database unpredictably. - Evict least-recently-used instead, and raise the default budget to 2000 (CACHE_MEMORY_MAX_ENTRIES). Reading a key now marks it as used, so a hot key only leaves when a hotter one takes its place. - Add opt-in stale-while-revalidate (CachedOptions.staleMs). The grace window lives on the entry, so one call site opting in protects every reader of that key. A failed background refresh keeps serving the last good value instead of falling through to the origin, and is reported once rather than per read. - Invalidate across processes. invalidateKey() now clears memory, deletes the Redis key and publishes a signal, so a value written by one process is no longer served stale by the others for the rest of its TTL. A failed Redis delete no longer skips the broadcast. - Guard against a refresh that started before an invalidation writing its outdated result back into the cache. - Read the news revision at most once a second per process instead of on every call, with a pub/sub signal to drop the local copy when it rotates. A Redis outage now degrades to the in-process cache rather than to no cache at all. - Warm the hot public keys on boot, so the first visitors after a deploy do not each pay for a miss. - Count hits, misses, stale serves, errors and evictions per key, exposed at GET /api/admin/devops/cache. Without it a wrong REDIS_URL, a full budget and a dead origin all look identical from the outside. - Enforce the imaging cache budget for real: records are .img/.json pairs, so the old cap counted files and never removed anything while entries were fresh. Sweeps are throttled per directory and prune to a low-water mark. - Cap the JWT version map, and stop per-test scratch roots from littering the runtime imaging cache. Public read-only endpoints get grace windows; admin, account and auth data deliberately stays fresh. Redis TTLs get a little jitter so keys written together no longer expire together. 3209 tests pass. next build could not be verified on this host: the optimized build is OOM-killed before prerender, so this has not run in a real Next runtime yet.	2026-09-25 18:26:45 +02:00