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Official upstream development repository for Cabal and cabal-install
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cabal-testsuite takes ages to run on Windows and GHC-8.8 or GHC-8.10 #7178

Open phadej opened 3 years ago

phadej commented 3 years ago

I have no clue what might be a reason. See recent master CI runs.

phadej commented 3 years ago

Comparison, on GitHub Actions. Faster is GHC-8.6.5, slower GHC-8.10.2 (8.10.2.2 from chocolatey):

cabal-testsuite\PackageTests\NewBuild\T4450\cabal.test.hs                                                                         OK (59.93s)
cabal-testsuite\PackageTests\NewBuild\T4450\cabal.test.hs                                                                         OK (11.99s)

On AppVeyor

cabal-testsuite\PackageTests\NewBuild\T4450\cabal.test.hs                                                                         OK (73.75s)
cabal-testsuite\PackageTests\NewBuild\T4450\cabal.test.hs                                                                         OK (14.84s)

Other individual tests seem to have similar-ish slowdown (the T4450 is just one of the slowest ones).

jneira commented 2 years ago

This continue being a problem, see https://github.com/haskell/cabal/actions/runs/1965714393 for example

jasagredo commented 4 months ago

Is this still relevant? Those GHCs are considered old now

geekosaur commented 4 months ago

It is certainly still true on the Windows part of CI.

jasagredo commented 4 months ago

Im not sure there is anything we can do here to speed it up. It is also true for MacOS.

ulysses4ever commented 4 months ago

MacOS is even worse. Not sure how we could act on this. If I were to speculate, I'd say it's a GHC issue. Although, Matthew recently discovered a massive slowdown on Windows due to how slow skipping tests is.

ulysses4ever commented 4 months ago

https://github.com/haskell/cabal/issues/9426