[EitanWong]

Closes #53

Scope

Kanban eng/t_f44014f8: measured baseline and reproducible diagnostic tests/reports only. No production implementation change, migration, deployment, public binary release or claimed optimization GREEN. Draft evidence handoff for the existing independent diagnostic reviewer; do not merge as a production optimization.

Evidence

• Baseline source9af806f; synthetic seed20260930,1k/10k/20k audit ×20/40 synthetic endpoint/session clients,three repeats.
• 18primary scenarios1080polls;1360per-persist records including separate frozen-budget/profile windows;45raw benchmark rows.
• Real nonpreview poll renews lease -> SaveFrom -> full-file history rewrite: one-client163239->1603242B/persist,three REDs against2x growth guard.
• SaveFrom B/op growth~9.685x;20k/20active handler medianp95=498.895ms vs200ms;stateMu113.72aggregate waitingseconds(91.61%block delay). Audit-only and event-only controls, CPU/heap/block/mutex call stacks retained.
• Exact supplied ops CSV window21samples/599.842782s: write_bytes delta23150555136B,mean38594371.443B/s,not uptime-derived~45MB/s. No production state/profile copied.

Verification

• Repository bash scripts/check.sh: actualexit0.
• go test -race -count=1 ./...: actualexit0.
• Tagged fixture/matrixrace: actualexit0.
• Reproducible runner and summarizer: actualexit0;opt-in performanceRED exits1 deliberately retained. Exact report reproduction/count assertions pass.
• Gitbranchpolicy fixed via realissue53 andperf/53-rdev-baseline-t-f44014f8;old invalidbranch keptforaudit. No policy bypass/historyrewrite.
• Reports/raw commands/env/exit andCSV/JSON:docs/performance/rdev-baseline-20260930. Synthetic .pprof originals remain in durable localartifact,notgit.

Explicit limitations and CEO decision

Claude analysis requested twice exited124 withaborted_streaming,zeromodelUsage,noeffectiveanalysis/actualmodelreceipt. At2026-09-30 16:04 BeijingLucky/CEO authorized thisBASELINE-ONLY handoff using verifieddata+perf-authored analysis;this isNOTdual-enginePASS. Existingreviewer t_1b876885 independentlyjudgesdiagnostics.

The decision doesnot relaxCoderactualCodex+Claude,finalsameSHAQA/Reviewer/CI,700k/1.4mgrowth,>=60minbaseline/candidatesoak,MCP/managedhostACK/RTT,Windowslivecompatibility,durability/migration/rollbackorreleasegates. Nohealth200/submit202 iscalledhostACK. Nooptimized candidate or deployment claim.

Rollback/safety

Production source unchanged;taggeddiagnostics excludedfromdefaultCI. No realsecret,usercontent,snapshot,binary or production memoryprofile committed. The statistics useprocess-levelIOandnetstatefilesizegrowth;neitherfsyncproofnortruechanged-recordbytes. No deletionofaudit/security weakening/forcedGC.

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