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ci: lock in compile speed with tighter guards and warm/edit comparisons - #944
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…urements Cold 1k/3k/5k/10k budgets drop to 13/25/42/77 s and the warm and one-model edit budgets to 11/12 s at 3k and 19/21 s at 5k, about 1.35x the p90 of the dense jobs since the native-analysis parallelism change. Peak RSS limits drop to 800 MiB at 1k, 1.5 GiB at 3k and 2.25 GiB at 5k, about 1.35x the CI maximum; 10k keeps 3.25 GiB.
…vious release The same-runner ratio job now times cold, unchanged warm and one-model edit compiles of the dense and fresh 3000-model projects for base and head, each on its own generator's project, and fails any mode above 1.10x. Warm and edit reuse the cold project and verify that they hit and miss the analysis cache as intended. The release comparison adds a one-model edit compile of the inspection benchmark and uncached, warm and one-model edit compiles of the dense 3000-model all-rules benchmark, which each version generates with its own generator. All six compile commands are held to a fixed 1.15x wall and CPU limit against the previous release.
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Why
The dense compile time budgets sat 2–3× above real CI times, and only cold compiles were compared against main, so much of the CHI-441 speed and memory work could erode without failing CI. Many small per-PR regressions could also accumulate between releases (CHI-495).
Changes
Verification
make check-ci.