Slow when typing? about polymode

[vspinu]

It is normal for big files. I haven´t implemented caching as yet. So, every
time you insert a character chunk detection is triggered.

How big is your file/chunk?

On 10 August 2013 07:06, Muchenxuan Tong [email protected] wrote:

The mode is great! But it became very slow when typing (not when I move
the cursor around).

Is it normal?

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[demon386]

The file is actually quite small, and it's way too slow.

I found turning off font-lock-mode will make it normal.

[vspinu]

It is a bug then. can you please attach your file?

On 10 August 2013 09:21, Muchenxuan Tong [email protected] wrote:

The file is actually quite small, and it's way too slow.

I found turning off font-lock-mode will make it normal.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/7#issuecomment-22435524
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[demon386]

I don't think it's related to content of file.

In an Rmd file I can type

# dfdf dfdfdf _

It's fine till now. Then when a new line starts it becomes very slow.:

# dfdf dfdfdf
dfxx _

I guess it has something todo with font-lock.

[vspinu]

I have started developing polymode again by adding new markdown+brew+R RAPPORT mode (see #11). The speed problem turned to be the markdown handling of links fontification

I have informed the maintainer and, for the time being, I am removing markdown fontification hooks from polymode.

Could you please check that the speed issues have been resolved. Thanks.

[demon386]

Thanks for the work. However, for me it's still slow.

I've checked window-configuration-change-hook and after-change-functions in the buffer:

window-configuration-change-hook is a variable defined in `C source code'.
Its value is (linum-update-current t)

after-change-functions is a variable defined in `C source code'.
Its value is (jit-lock-after-change t)

[vspinu]

There are no optimisation and no caching of any kind so far. That will come latter.

Is this a very old computer? I am on a 8 years old laptop and everything is very fast.

Could you please open subset.Rmd in tests directory, got into first paragraph and do M-x (benchmark-run 1000 (pm/get-innermost-span)). Same for the first code chunk {r test1}.

For me the first one is 0.44 seconds and the second is 0.25. So even without optimisation everything is infinitely fast.

[demon386]

I use a late-2011 MacBook Pro and shouldn't be that slow.

the result I got from running the benchmark

(0.252103 1 0.09603299999999848)

It's fast when browsing the file, but still slow when typing.

[vspinu]

Probably some weird interaction with some other mode. What else do you
have in post-command-hook?

I have (polymode-select-buffer t) in my local hook and the following in
global:

global-font-lock-mode-check-buffers
global-subword-mode-check-buffers
global-auto-complete-mode-check-buffers
smartparens-global-mode-check-buffers
sp--post-command-hook-handler

Just to make sure that it is polymode to blame. If you do

M-: (remove-hook 'post-command-hook 'polymode-select-buffer t)

do you observe any speed up while typing?

[demon386]

I tried to remove everything in post-command-hook and it's still slow.

Yet setting pm--dbg-fontlock to nil save my life, becoming insanely fast.

[demon386]

Ok. I've figured out. It has something todo with linum-mode. It's slow when global-linum-mode is enabled.

[vspinu]

Thanks for figuring it out. I can reproduce. The difference is indeed
noticeable.

Linum is very heavy as it puts overlays on every line. Poly-mode
transfers overlays between indirect buffers. Will have to figure out a
workaround.

[nstjhp]

I also have this problem with linum-mode but in my case nothing ever appears until you move the cursor. Is there a line I can put in my .emacs to prevent global-linum-mode when I open a file in polymode e.g. .Rmd?

[vspinu]

I plan to revisit polymode in the near features and to investigate this
issue more closely.

Each polymode has a hook. In this case poly-markdown+r-mode-hook. You
can use it to deactivate linum-mode.

Nick Pullen on Fri, 28 Feb 2014 04:56:50 -0800 wrote:

I also have this problem with linum-mode but in my case nothing ever appears
until you move the cursor. Is there a line I can put in my .emacs to prevent
global-linum-mode when I open a file in polymode e.g. .Rmd?

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[nverno]

Thankyou for this thread! I had just about given up trying to use polymode because I couldn't figure this issue out. Might be useful to add a note about global-linum-mode to the warnings section of the readme.
Thanks for the great work

[vspinu]

This one seem to have been finally fixed.