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From: | GNU bug Tracking System |
Subject: | [debbugs-tracker] bug#29846: closed (scroll and fontify takes longer time for file in slow network) |
Date: | Thu, 28 Dec 2017 19:04:02 +0000 |
Your message dated Thu, 28 Dec 2017 14:03:47 -0500 with message-id <address@hidden> and subject line Re: bug#29846: scroll and fontify takes longer time for file in slow network has caused the debbugs.gnu.org bug report #29846, regarding scroll and fontify takes longer time for file in slow network to be marked as done. (If you believe you have received this mail in error, please contact address@hidden) -- 29846: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=29846 GNU Bug Tracking System Contact address@hidden with problems
--- Begin Message ---Subject: scroll and fontify takes longer time for file in slow network Date: Mon, 25 Dec 2017 14:03:43 +0800 Hi,Windows 7, GNU Emacs 27.0.50 (build 1, x86_64-w64-mingw32) of 2017-12-09.Issue:I have remote dirver (//server/path) mapped to my windows system (samba?). The network is slow, and it takes some time to open the file. However, after I have the file opened and scroll down, it takes a long time to scroll to the next screen. It gets worse if the jit-lock-debug-mode is on. After that if I try to scroll back to those has been fontified, it get fluent as expected.If I open the same file in a local driver (speed is higher than the network definitely), the scroll is very fluent.If I open a txt file (fundmental-mode, not fontification) in the same remote directory, the scroll actions are fluent as well.Per my understanding, all actions should be done in memory when a file has been read into buffer, except backup, autosave, etc. The response should not depents on where the file located phically.How to repeat it:1. Find a slow transfer rate network (sorry, it may be hard)2. Prepare a long c file, 3-4 screens.3. take font-lock-mode on (jit-font-mode)4. Open the c file and scroll down, scroll down, scroll down...5. scroll up, scroll up, scroll upI have tried profiler. It indicates, the jit-font and redisplay take majority of the cpu time.1. open the c file2. profiler-start3. scroll down, scroll down, scroll down...4. profiler-reportBest Regards,Shuguang Sun
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--- Begin Message ---Subject: Re: bug#29846: scroll and fontify takes longer time for file in slow network Date: Thu, 28 Dec 2017 14:03:47 -0500 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) >> I believe this bug was introduced by yours truly >> in commit 6bc76cee212aab0a2c02f8c28213fc842cc7880f: [...] >> And I think the patch below hence belongs in emacs-26. Any objection? > LGTM, please push to emacs-26. Installed, Stefan
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