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n30nex
63d63ea90a
Fixes #2301. Readiness probes currently scan every retained transmission while holding the packet-store read lock. Once `StartupLoadDone` closes, this reads the maintained observation counter beside the transmission count under that same lock. Count extraction becomes O(1), with no new cache, query or allocation. Startup retains the original scan: the background loader publishes indexes before its packet slice, so switching on readiness or `LoadComplete` would be premature. Response fields, readiness status, ingestion and configuration remain unchanged. Whole-handler benchmark medians, microseconds per probe: | Retained transmissions | Upstream | Candidate | | ---: | ---: | ---: | | 1,000 | 72.14 | 83.84 | | 30,000 | 320.85 | 65.74 | | 100,000 | 1,228.50 | 81.97 | Four alternating pairs, 10,000 iterations/size, real SQLite-loaded fixtures with three observations per transmission on average; Go 1.27.2, Windows/amd64, two CPUs. All samples retained; shared-host variability means no small-cache or production-latency improvement is claimed. Allocations remain 36/probe. The included benchmark supports reproduction against unchanged upstream production plus the identical harness. TDD exemption: pure performance refactor; **all pre-existing test files are byte-unchanged**. Added characterization tests pass before and after, covering loaders, deduplication, live updates, eviction, partial startup failures, concurrent snapshots and liveness. Independent review prompted test-only follow-up `2a0083b1`, which detects premature counter use; production remains identical to measured `1b8e6680`. Full server, race, ingestor and post-push browser/API checks pass locally. [Final-head CI passes](https://github.com/Kpa-clawbot/CoreScope/actions/runs/40213482779), including all browser shards and architecture builds. No customizer changes.