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gh-119727: Run tests in parallel by default #120456

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gh-119727: Run tests in parallel by default 
The Python test runner (regrtest) now runs tests in parallel by
default.  Use the --single-process option to run tests sequentially
in a single process.
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@vstinner
vstinner committed Jun 13, 2024
commit 5517f14c19e283f88c6832a1bf2cc044f0948789
2 changes: 1 addition & 1 deletion Lib/test/libregrtest/cmdline.py
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Expand Up @@ -157,7 +157,7 @@ def __init__(self, **kwargs) -> None:
self.verbose3 = False
self.print_slow = False
self.random_seed = None
self.use_mp = None
self.use_mp = 0
self.forever = False
self.header = False
self.failfast = False
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Tests/2024-06-13-17-11-54.gh-issue-119727.Fz2b2I.rst
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@@ -0,0 +1,3 @@
The Python test runner (regrtest) now runs tests in parallel by default. Use
the ``--single-process`` option to run tests sequentially in a single process.
Patch by Victor Stinner.