MSYS build on VS 2019 image is considerably slower than VS 2017 one

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belegdol

24 Jul, 2020 10:46 AM

Hello,

this is a follow-up to
https://help.appveyor.com/discussions/problems/25195-msys-build-on-vs-2019-image-is-twice-as-slow-as-on-vs-2017-one
I have checked again yesterday, and the VS2019 build was still almost 10 minutes slower than VS2017:
https://ci.appveyor.com/project/belegdol/mame/builds/34267225
this is despite the fact that the pacman update finishes and the actual build started at 08:51 mark for VS2017 and at 02:23 mark for VS2019. All else being equal, VS2019 should have been about six and a half minutes faster, not 8 minutes slower.
As mentioned in the original issue, the upstream project (startaq/mame) semi-regularly misses the 60 minutes mark. If builds on both VS versions were equal, time saved by smaller MSYS update could just be enough to make the cutoff reliably.

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