durin42 added a comment.

  In D7295#110254 <https://phab.mercurial-scm.org/D7295#110254>, @mharbison72 
wrote:
  
  > In D7295#107482 <https://phab.mercurial-scm.org/D7295#107482>, @indygreg 
wrote:
  >
  >> Since type checking is slow (but there are state files we can reuse to 
speed things up), we'll need to figure out how to make this work in CI. But I 
have no doubt we can figure something out. Out of curiosity, how long does 
pytype take to run in a clean source directory, without any state files?
  >
  > It takes 15-20 minutes on a 2018 Mac mini.  In addition to the disabled 
files here, I've disabled:
  >
  >   mercurial/httppeer.py
  >   mercurial/repoview.py
  >   mercurial/localrepo.py
  >   mercurial/revlog.py
  >   mercurial/merge.py
  >   mercurial/testing/storage.py
  >
  > But I've also added back these, and sprinkled various disable comments 
around:
  >
  >   mercurial/bundlerepo.py
  >   mercurial/error.py
  >   mercurial/exchange.py
  >   mercurial/policy.py
  >   mercurial/pycompat.py
  >   mercurial/scmwindows.py
  >   mercurial/windows.py
  >   mercurial/wireprotoframing.py
  >
  > Even with the state files, it seems to take 10-15 minutes or so.
  
  Ooh, can you send your extra suppressions? For the most part I've been 
tackling this as a side project when I'm waiting on compiles.
  
  As to doing individual files: that's well and good, and might be a viable 
approach for mypy. That said, my sense has been that mypy is faster and 
significantly less useful, since we don't get cross-file analysis of what's 
going on. I _think_ pytype gets faster as we add more annotations, so my rough 
thought thus far as been to try and get some subset of the codebase clean, 
transitively, and then try to start stamping some types on important functions 
and interfaces to constrain things. Where I'd _really_ like to get is to be 
able to migrate the `@command` decorators and friends to use strings instead of 
bytes, and be able to recommend typechecking as a way for extension authors to 
clean things up, but that'll take a while.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7295/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7295

To: durin42, #hg-reviewers, indygreg
Cc: mharbison72, dlax, indygreg, mjpieters, mercurial-devel
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