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feat(bench): pool scaling bench is a plan, ADR-0072 on parallelism - #336
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by-cores.sh is replaced by flang/concurrency/bench/by-cores.fscript: the same request per worker count, minimum wall time of three runs, runs per second and speed-up against the first count. The stand is fed through sh only because the binary host has no order with stdin. Running it on the stand "pachka" (1024 processes, K = 64) shows that the printed C pool does not scale today: 2322 ms on one thread, 4446 ms on eight. ThreadSanitizer names the cause: fl_tick and fl_enter write fl_now and fl_watch_frames on every call from every thread. With those two writes removed in a scratch copy of the runtime the same stand runs 2314 ms on one thread and 69 ms on 64, and check-mode output stays byte-identical. The runtime is a seed print input, so the fix is recorded in ADR-0072 as step 1 for the next batch print, together with the model for parallel map over total functions, fold only over a kernel-proved monoid, targets, tests and print cost. docs/scheduler-benchmark.md says the pool does not scale as printed today and points the recipe at the plan; inventory and prose numbers follow the removed shell file. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PNHrA3rG7FTWhB11E7pjDQ
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Verified on the tree of dev plus this branch (2ddf8c4): the checker test set passes, the provability verdict is green with all four checks, the proved-share ledger and the rule tables agree with the tree, pre-push is green, commit messages follow the convention.
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