[O] Org mode in combination with emacs follow-mode is terrible
Hi, I'm using emacs (git checkout v. 27.0.50) and Org mode (git checkout release_9.1.13-760-g8def68). My typical setup is to use a maximized or full screen emacs frame split into five windows positioned vertically one next to the other. All five windows display one and the same file, that is opened using emacs follow-mode, so that every window is displaying a portion of the same file in a continuous manner. Yet, there seems to be an incompatibility between Org mode and follow-mode: there is terrible lag with every single key input (on a very fast quad core machine); every key stroke produces a 100% processor load. It would seem that this is even worse, when working on portions towards the end of the file. If I deactivate follow-mode, the problem disappears. Anyone got an idea what's going on here and how to debug that? Thanks Gerald. - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
I tried profiling my use of org-mode in conjunction with follow-mode; I
did the following:
1. M-x profiler-start
2. I enabled follow-mode in my buffer
3. I did some editing
4. M-x profiler-report
5. M-x profiler-stop
here's the result:
Collapsed, the report looks like that:
+ command-execute8789 47%
+ follow-post-command-hook 7755 41%
+ ...1976 10%
+ redisplay_internal (C function) 104 0%
+ yas--post-command-handler40 0%
+ timer-event-handler 20 0%
tooltip-hide 7 0%
And somewhat expanded:
- command-execute8789 47%
- call-interactively8789 47%
- byte-code8174 43%
- read-extended-command 8174 43%
- completing-read8174 43%
- # 8174 43%
- apply8174 43%
- helm--completing-read-default 8174 43%
- helm-completing-read-sync-default-handler 8174 43%
- helm-completing-read-default-18174 43%
- helm-comp-read 8174 43%
- helm8165 43%
- apply 8165 43%
- helm 8165 43%
- apply8165 43%
- helm-internal 8165 43%
- helm-read-pattern-maybe8150 43%
+ read-from-minibuffer 8079 43%
+ helm-update 43 0%
- # 9 0%
+ helm-cleanup 9 0%
+ helm-display-buffer 6 0%
+ helm-make-source 9 0%
+ funcall-interactively 615 3%
- follow-post-command-hook 7755 41%
- follow-adjust-window 7755 41%
- follow-windows-start-end 7732 41%
- follow-calc-win-end 7732 41%
+ pos-visible-in-window-p 25 0%
+ posn-at-x-y 7 0%
+ window-inside-pixel-edges 3 0%
+ follow-all-followers4 0%
follow-avoid-tail-recenter 3 0%
If I understand correctly "follow-calc-win-end" would be the function
that uses most of cpu time.
I can't say how "normal" the other 47% under "command-execute" are,
which mainly seems to be helm-related ("helm-update").
Can anyone give an advice on possible optimizations with this situation?
Gerald.
On Mi, Jun 13 2018, Joost Kremers wrote:
> Actually, I would suspect it's more of a problem for follow-mode than
> org-mode, because follow-mode needs to keep the different windows in sync.
> For this, it adds a function to `post-command-hook', which means it's run
> after every key press.
>
> It's not inconceivable that `follow-mode' does something that is extra
> time-consuming in an Org buffer. To find out what that might be, you could
> try the Elisp profiler that comes with Emacs. See the section "Profiling"
> in the Elisp manual for details.
>
> Once you've found out which function(s) consume so much time, it might be
> possible to ask in here or on emacs-devel what exactly is causing the
> problem and whether there's a way around it.
--
Dr. Gerald Wildgruber
Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte
Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft
Technische Universität Berlin
Straße des 17. Juni 135
D-10623 Berlin
http://www.philosophie.tu-berlin.de/menue/home/
T. +49 (0)30 314 25924
F. +49 (0)30 314 23107
wildgru...@tu-berlin.de
-
Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
Thanks Joost, that's interesting! I never used the profiler but I will try and see how far I get with it and then come back here. Gerald. On Mi, Jun 13 2018, Joost Kremers wrote: > On Wed, Jun 13 2018, Eric S Fraga wrote: >> On Wednesday, 13 Jun 2018 at 09:53, Gerald Wildgruber wrote: >>> Switching to text-mode, with 5 windows and follow-mode still being >>> active reduces lag significantly. >>> >>> So there must be an issue specifically with the combination of org-mode >>> and follow-mode! >> >> I don't think there's an issue per se in the sense of bugs. Org does >> much more processing of the text than does text mode so if you have 60k >> worth of text to process each time you type something, it's probably not >> surprising that there is a lag. > > Actually, I would suspect it's more of a problem for follow-mode than > org-mode, because follow-mode needs to keep the different windows in sync. > For this, it adds a function to `post-command-hook', which means it's run > after every key press. > > It's not inconceivable that `follow-mode' does something that is extra > time-consuming in an Org buffer. To find out what that might be, you could > try the Elisp profiler that comes with Emacs. See the section "Profiling" > in the Elisp manual for details. > > Once you've found out which function(s) consume so much time, it might be > possible to ask in here or on emacs-devel what exactly is causing the > problem and whether there's a way around it. -- Dr. Gerald Wildgruber Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft Technische Universität Berlin Straße des 17. Juni 135 D-10623 Berlin http://www.philosophie.tu-berlin.de/menue/home/ T. +49 (0)30 314 25924 F. +49 (0)30 314 23107 wildgru...@tu-berlin.de - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
Thanks again; I'm always using the latest git checkout of emacs (v.27, see my first posting). On Mi, Jun 13 2018, Eric S Fraga wrote: > I don't think there's an issue per se in the sense of bugs. Org does > much more processing of the text than does text mode so if you have 60k > worth of text to process each time you type something, it's probably not > surprising that there is a lag. 60k is a lot of text and I assume there > are many headings etc.? Yes, indeed, there are! Actually does this mean that emacs or org-mode has to take into consideration every single bit of text in the visible part buffer of the buffer, whenever I press a key? what needs to be calculated by simple entering of text? Gerald -- Dr. Gerald Wildgruber Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft Technische Universität Berlin Straße des 17. Juni 135 D-10623 Berlin http://www.philosophie.tu-berlin.de/menue/home/ T. +49 (0)30 314 25924 F. +49 (0)30 314 23107 wildgru...@tu-berlin.de - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
On Wed, Jun 13 2018, Eric S Fraga wrote: On Wednesday, 13 Jun 2018 at 09:53, Gerald Wildgruber wrote: Switching to text-mode, with 5 windows and follow-mode still being active reduces lag significantly. So there must be an issue specifically with the combination of org-mode and follow-mode! I don't think there's an issue per se in the sense of bugs. Org does much more processing of the text than does text mode so if you have 60k worth of text to process each time you type something, it's probably not surprising that there is a lag. Actually, I would suspect it's more of a problem for follow-mode than org-mode, because follow-mode needs to keep the different windows in sync. For this, it adds a function to `post-command-hook', which means it's run after every key press. It's not inconceivable that `follow-mode' does something that is extra time-consuming in an Org buffer. To find out what that might be, you could try the Elisp profiler that comes with Emacs. See the section "Profiling" in the Elisp manual for details. Once you've found out which function(s) consume so much time, it might be possible to ask in here or on emacs-devel what exactly is causing the problem and whether there's a way around it. -- Joost Kremers Life has its moments
Re: [O] Org mode in combination with emacs follow-mode is terrible
On Wednesday, 13 Jun 2018 at 09:53, Gerald Wildgruber wrote: > Switching to text-mode, with 5 windows and follow-mode still being > active reduces lag significantly. > > So there must be an issue specifically with the combination of org-mode > and follow-mode! I don't think there's an issue per se in the sense of bugs. Org does much more processing of the text than does text mode so if you have 60k worth of text to process each time you type something, it's probably not surprising that there is a lag. 60k is a lot of text and I assume there are many headings etc.? Part of the attraction of org mode is the visual representation of the text and this unfortunately comes at a cost. I cannot remember what version of Emacs you are using. If not the latest, it might be worth trying v26.1 or even one of the latest snapshots in case? -- Eric S Fraga via Emacs 25.2.2, Org release_9.1.13-791-g842002 signature.asc Description: PGP signature
Re: [O] Org mode in combination with emacs follow-mode is terrible
Switching to text-mode, with 5 windows and follow-mode still being active reduces lag significantly. So there must be an issue specifically with the combination of org-mode and follow-mode! Gerald. On Di, Jun 12 2018, Eric S Fraga wrote: > On Tuesday, 12 Jun 2018 at 12:23, Gerald Wildgruber wrote: >> Hi Eric, >> >> thanks for the input: indeed, I always use at least five windows (on a >> 40" display), as this setup displays simultanously almost 60Kb of text, >> an entire papaer, which is excellent! > > That's a lot of text so maybe it's really not surprising maybe that > there is a lag. What happens if you edit the same file in text-mode? > >> Elsewise: do you see any reason or issue with both modes enabled that >> could lead to such behavior: it would seem that emacs tries to >> calculate something with every new keystroke, that involves all text >> before point. > > Maybe font-lock and org-indent may impact on this? > > I also find that the presence of tables often slows org down although > it's difficult to quantify the actual impact. -- Dr. Gerald Wildgruber Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft Technische Universität Berlin Straße des 17. Juni 135 D-10623 Berlin http://www.philosophie.tu-berlin.de/menue/home/ T. +49 (0)30 314 25924 F. +49 (0)30 314 23107 wildgru...@tu-berlin.de - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
Thanks! actually every single one of the following does help a bit: - reducing number of windows to 3 - switching to text-mode - dectivating org-indent-mode, with org-mode still being active There's still lag, but not as extreme as with my original setup. Still, the most significant change occurs by deactivating follow-mode: every lag simply disappears. Gerald. On Di, Jun 12 2018, Eric S Fraga wrote: > On Tuesday, 12 Jun 2018 at 12:23, Gerald Wildgruber wrote: >> Hi Eric, >> >> thanks for the input: indeed, I always use at least five windows (on a >> 40" display), as this setup displays simultanously almost 60Kb of text, >> an entire papaer, which is excellent! > > That's a lot of text so maybe it's really not surprising maybe that > there is a lag. What happens if you edit the same file in text-mode? > >> Elsewise: do you see any reason or issue with both modes enabled that >> could lead to such behavior: it would seem that emacs tries to >> calculate something with every new keystroke, that involves all text >> before point. > > Maybe font-lock and org-indent may impact on this? > > I also find that the presence of tables often slows org down although > it's difficult to quantify the actual impact. -- Dr. Gerald Wildgruber Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft Technische Universität Berlin Straße des 17. Juni 135 D-10623 Berlin http://www.philosophie.tu-berlin.de/menue/home/ T. +49 (0)30 314 25924 F. +49 (0)30 314 23107 wildgru...@tu-berlin.de - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
On Tuesday, 12 Jun 2018 at 12:23, Gerald Wildgruber wrote: > Hi Eric, > > thanks for the input: indeed, I always use at least five windows (on a > 40" display), as this setup displays simultanously almost 60Kb of text, > an entire papaer, which is excellent! That's a lot of text so maybe it's really not surprising maybe that there is a lag. What happens if you edit the same file in text-mode? > Elsewise: do you see any reason or issue with both modes enabled that > could lead to such behavior: it would seem that emacs tries to > calculate something with every new keystroke, that involves all text > before point. Maybe font-lock and org-indent may impact on this? I also find that the presence of tables often slows org down although it's difficult to quantify the actual impact. -- Eric S Fraga via Emacs 25.2.2, Org release_9.1.13-791-g842002 signature.asc Description: PGP signature
Re: [O] Org mode in combination with emacs follow-mode is terrible
Hi Eric, thanks for the input: indeed, I always use at least five windows (on a 40" display), as this setup displays simultanously almost 60Kb of text, an entire papaer, which is excellent! I will try the results with fewer windows tomorrow, when back in office. Elsewise: do you see any reason or issue with both modes enabled that could lead to such behavior: it would seem that emacs tries to calculate something with every new keystroke, that involves all text before point. Gerald. On Di, Jun 12 2018, Eric S Fraga wrote: > On Monday, 11 Jun 2018 at 14:56, Gerald Wildgruber wrote: >> My typical setup is to use a maximized or full screen emacs frame split > > [...] > >> portions towards the end of the file. If I deactivate follow-mode, the >> problem disappears. > > I have a 38" monitor and I frequently do what you say. However, I > typically only split the frame into 3 windows. I don't remember seeing > any lag. But I am currently away so cannot verify. What happens if you > try with less windows? -- Dr. Gerald Wildgruber Institut für Philosophie, Literatur-, Wissenschafts- und Technikgeschichte Literaturwissenschaft mit Schwerpunkt Literatur und Wissenschaft Technische Universität Berlin Straße des 17. Juni 135 D-10623 Berlin http://www.philosophie.tu-berlin.de/menue/home/ T. +49 (0)30 314 25924 F. +49 (0)30 314 23107 wildgru...@tu-berlin.de - Sent with mu4e
Re: [O] Org mode in combination with emacs follow-mode is terrible
On Monday, 11 Jun 2018 at 14:56, Gerald Wildgruber wrote: > My typical setup is to use a maximized or full screen emacs frame split [...] > portions towards the end of the file. If I deactivate follow-mode, the > problem disappears. I have a 38" monitor and I frequently do what you say. However, I typically only split the frame into 3 windows. I don't remember seeing any lag. But I am currently away so cannot verify. What happens if you try with less windows? -- Eric S Fraga via Emacs 25.2.2, Org release_9.1.13-791-g842002 signature.asc Description: PGP signature
[O] Org mode in combination with emacs follow-mode is terrible
Hi, I'm using emacs (git checkout v. 27.0.50) and Org mode (git checkout release_9.1.13-760-g8def68). My typical setup is to use a maximized or full screen emacs frame split into five windows positioned vertically one next to the other. All five windows display one and the same file, that is opened using emacs follow-mode, so that every window is displaying a portion of the same file in a continuous manner. Yet, there seems to be an incompatibility between Org mode and follow-mode: there is terrible lag with every single key input (on a very fast quad core machine); every key stroke produces a 100% processor load. It would seem that this is even worse, when working on portions towards the end of the file. If I deactivate follow-mode, the problem disappears. Anyone got an idea what's going on here and how to debug that? Thanks Gerald. - Sent with mu4e
