[issue35195] Pandas read_csv() is 3.5X Slower on Python 3.7.1 vs Python 3.6.7 & 3.5.2 On Windows 10

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

> This issue may be related to bpo-34485.

I'm thinking to:

New changeset 177d921c8c03d30daa32994362023f777624b10d by Victor Stinner in branch 'master':
bpo-34485, Windows: LC_CTYPE set to user preference (GH-8988)
https://github.com/python/cpython/commit/177d921c8c03d30daa32994362023f777624b10d

Oh, I only made this change in the future Python 3.8 (master branch). So this change may be unrelated.

Note: Right now, my Windows VM is broken, so I cannot investigate this performance issue which seems to be specific to the msvcrt (libc of Microsoft VisualStudio).

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