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Re: Performance regressions in Emacs 25.
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From: |
Stefan Monnier |
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Subject: |
Re: Performance regressions in Emacs 25. |
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Date: |
Sat, 27 Aug 2016 14:56:01 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
> I am the author of shen-elisp [1], an implemenation of the Shen [2]
> programming language in Elisp. I've noticed that when I built and ran the
> test suite in Emacs 24 (via Arch) and Emacs 25 (compiled in Arch)
> (config.log attached) I ran into performance regression where the test
> suite went from 55 seconds to 100 seconds to complete. My .emacs (actually
> .spacemacs) was identical across both runs. This regression is reproducible
> across OS's.
Can you check that the two instances were compiled with the same flags?
Also, please try M-x profiler-start RET RET at the start of the test and
M-x profiler-report RET at the end.
Comparing the two profiles might give some idea of what's going on.
Stefan