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Old 07-22-2012, 02:23 PM   #1
Registered: Jul 2012
Distribution: Slackware-current, 32bit
Posts: 37

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Emacs 24.1 performance regression.

Hi! I've run an emacs test (kind of), using, for example, file /usr/src/linux/crypto/testmgr.h (actually problem reproducible on other "large files" (several K of lines).

Steps to reproduce:
1. open file
2. push C-v (or PgDn) and do not release it till EOF reached
3. stuttering occurs (screen stops refreshing).

Actually in previous versions of Emacs i never seen such behaviour (in 23.1 i'm 100% confident).
If i open same file in vim, for example, it scrolls till EOF smoothly, never stutters.
Somebody, close to emacs development, has to check this out. I just tried it on latest 24.1.50 - problem persists, and -Q option gives same result.
Old 07-26-2012, 01:52 PM   #2
Registered: Jul 2012
Distribution: Slackware-current, 32bit
Posts: 37

Original Poster
Rep: Reputation: Disabled
Oh, nevermind. I've figured how to tweak it.

M-x customize-option
Customize variable: jit-lock-chunk-size



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