AppVeyor is selectively slow

[Peque]

I have observed that AppVeyor pipelines time out sometimes, even when the changes should clearly not affect the CI process:

• DOC: Update contributing notes #2558
• BUG: fix #2371 #2372
• Python 3.6 support #2512

Se how #2558 is only updating the README file.

The only pattern I see is: those people opening the PR are not part of Quantopian. Could it be that AppVeyor executes the pipelines differently when the PR is opened by a member of the organization? Do you, Quantopian, have a paying AppVeyor account?

Otherwise I cannot explain the behavior. Any other ideas?

[dmichalowicz]

I just attempted creating my own branch with the changes from #2512 (I am Quantopian org member) and the AppVeyor build looks to have had no issues, at least timing out that is. We do have a paid subscription but it's not clear to me why that should affect performance. Will need to investigate more.