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bug#55729: 27.1; Emacs 28.1 `string-match' is five times slower than Ema
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From: |
Ihor Radchenko |
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Subject: |
bug#55729: 27.1; Emacs 28.1 `string-match' is five times slower than Emacs 27.1 |
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Date: |
Mon, 30 May 2022 23:01:07 +0800 |
Chen Bin <chenbin.sh@gmail.com> writes:
> Run below code in both Emacs 28.1 and Emacs 27.1
>
> ;; Run "base64 /dev/urandom | head -c 3000000000 > 3g.txt" to create 3g.txt
> ;; Then run below code in Emacs,
>
> Using same machine, same emacs setup, 28 is alwasy much slower than 27.
On my system:
Emacs-27 (0.032783519 0 0.0) vs (0.093436952 0 0.0)
Emacs-28 (latest) (0.037079772999999996 0 0.0) vs (0.162106006 0 0.0)
Emacs-29 (latest) (0.03358834 0 0.0) vs (0.15387368299999998 0 0.0)
Best,
Ihor