I am hoping I make it.
If I make it, we could discuss moving Windows Rtools 3.5 testing to Github Actions and moving Jenkins Windows agents to Rtools 4.0 : Using GitHub Actions on the Stan Math library
Reasons:
- This would speedup Jenkins testing (we are currently limiting the parallel execution on Jenkins agents as the g++ 4.9.3 uses much more RAM and tests crash if too many parallel compilations are running).
- faster testing would enable us to add more testing coverage for Windows (OpenCL, threading tests, etc) and stay in “finite” testing time
- would enable “Jumbo” test files on windows which again speeds up testing
- obviously adds testing coverage for Windows with RTools 4.0 to which I suspect our users will move soon. And we should be suggesting that also now that compiling with Rtools 4.0 will be ~2x faster: https://github.com/stan-dev/cmdstan/issues/872