[pypy-issue] Issue #2858: In some cases, the GIL is not released often enough (pypy/pypy)

[Armin Rigo]

New issue 2858: In some cases, the GIL is not released often enough
https://bitbucket.org/pypy/pypy/issues/2858/in-some-cases-the-gil-is-not-released

Armin Rigo:

The GIL is implemented with optimizations that try to not release it during a burst of very short C calls.  But in some cases these optimizations are too eager and cause the GIL to remain in the same thread, seemingly for up to 20ms.  See attached demo.