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perf: reduce lock contention on route match (RWLock or route snapshot) #4
Description
Activity
- linked a pull request that will close this issueperf: parking_lot mutex for route/OpenAPI state (issue #4) #35
on Apr 26, 2026 - added a commit that references this issue
on Apr 26, 2026 - linked a pull request that will close this issueperf: RwLock for AppState to cut request-path contention (issue #4) #41
on Apr 26, 2026 - added a commit that references this issue
on Apr 26, 2026 Reopened after backlog review (2026-04-26): implementation is partial or the topic remains active (see
.github/ISSUE_BACKLOG/bodies/04.mdandPRIORITIES.md).Note: body file is
.github/ISSUE_BACKLOG/bodies/04.md.- added a commit that references this issue
on Apr 26, 2026 - linked a pull request that will close this issueIssue 4 lock free route snapshot #55
on Apr 26, 2026
Context
state.lock()is taken in multiple places per request.AppStatebundles routes plus fiveMutex<Router<usize>>and anopenapimutex.Direction A
freeze(), build anArc<CompiledRoutes>(clones of routers or a single matchit structure per method) behindArcSwaporOnceLockand read with no write path.Direction B
parking_lot::RwLockforopenapivsroutes—measure with Criterion microbenches orwrkon a hello handler.Acceptance criteria
benches/.Research
RouterandSync—today wrapped inMutex. Consider matchit 0.8 migration if applicable.