Paredit, smartparens very slow with large latex files

Paredit, smartparens very slow with large latex files

[Julien Cubizolles]

All the minor modes I've tried to navigate through sexps are very slow
when working with large latex files (>1000 lines). For example
sp-forward-sexp takes several seconds to do the following:
\(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
way to improve things ? I tried folding parts of the buffer but it
doesn't help since the folded part is still parsed.

Julien.

Re: Paredit, smartparens very slow with large latex files

[Tim Visher]

I've been told several times that any slow-down in emacs based on the
size of the buffer that is below `large-file-warning-threshold` should
be considered a bug. If Fundamental mode doesn't exhibit the problem,
I'd file a bug report with the maintainers of the package.

On Wed, Sep 11, 2013 at 5:59 AM, Julien Cubizolles <j.cubizolles@free.fr> wrote:
> All the minor modes I've tried to navigate through sexps are very slow
> when working with large latex files (>1000 lines). For example
> sp-forward-sexp takes several seconds to do the following:
> \(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
> way to improve things ? I tried folding parts of the buffer but it
> doesn't help since the folded part is still parsed.
>
> Julien.
>
>

Re: Paredit, smartparens very slow with large latex files

[Andreas Röhler]

Am 11.09.2013 11:59, schrieb Julien Cubizolles:
> All the minor modes I've tried to navigate through sexps are very slow
> when working with large latex files (>1000 lines). For example
> sp-forward-sexp takes several seconds to do the following:
> \(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
> way to improve things ? I tried folding parts of the buffer but it
> doesn't help since the folded part is still parsed.
>
> Julien.
>
>
>

IMO basically exist two sources for the problem.

a) an appropriate coding style.
b) slowness from nesting, which might be solved by an appropriate alternative command.

As for b, please tell if command from paredit.el is slow also.

As for a, seeing a style expand, which uses a lot of abstractions, resp. refactoring. This looks nice, enhances readability but makes
it slow very soon.

Best,

Andreas

Re: Paredit, smartparens very slow with large latex files

[Julien Cubizolles]

Andreas Röhler <andreas.roehler@easy-emacs.de> writes:

> Am 11.09.2013 11:59, schrieb Julien Cubizolles:

> a) an appropriate coding style.
> b) slowness from nesting, which might be solved by an appropriate
> alternative command.
>
> As for b, please tell if command from paredit.el is slow also.

Yes, it's also very slow.

> As for a, seeing a style expand, which uses a lot of abstractions,
> resp. refactoring. This looks nice, enhances readability but makes
> it slow very soon.

I'm not sure I'm following you. What exactly do you suggest ?

Julien.

Re: Paredit, smartparens very slow with large latex files

[Andreas Röhler]

Am 12.09.2013 22:36, schrieb Julien Cubizolles:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>> Am 11.09.2013 11:59, schrieb Julien Cubizolles:
>
>> a) an appropriate coding style.
>> b) slowness from nesting, which might be solved by an appropriate
>> alternative command.
>>
>> As for b, please tell if command from paredit.el is slow also.
>
> Yes, it's also very slow.
>
>> As for a, seeing a style expand, which uses a lot of abstractions,
>> resp. refactoring. This looks nice, enhances readability but makes
>> it slow very soon.
>
> I'm not sure I'm following you. What exactly do you suggest ?
>

Please tell the command-name tried from paredit.el.
If you could send me some code off-list, which triggers the bug, that might help to.

There are ways to fasten these things.


Andreas

> Julien.
>
>
>

Re: Paredit, smartparens very slow with large latex files

[Julien Cubizolles]

Andreas Röhler <andreas.roehler@easy-emacs.de> writes:


> Please tell the command-name tried from paredit.el.

paredit-forward takes roughly half a second to go from
\SI{10}{\meter\per\sec|ond} to \SI{10}{\meter\per\sec|ond}| in a large
buffer. It's instantaneous in *scratch*

sp-forward-sexp is even slower for the same task.

> There are ways to fasten these things.

I hope so.

Julien.

Re: Paredit, smartparens very slow with large latex files

[Andreas Röhler]

Am 16.09.2013 23:14, schrieb Julien Cubizolles:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>
>> Please tell the command-name tried from paredit.el.
>
> paredit-forward takes roughly half a second to go from
> \SI{10}{\meter\per\sec|ond} to \SI{10}{\meter\per\sec|ond}| in a large
> buffer. It's instantaneous in *scratch*
>

paredit-forward makes three stops with your example

start from sec|ond

\SI{10}{\meter\per\second}| to \SI{10}{\meter\per\second}
\SI{10}{\meter\per\second} to| \SI{10}{\meter\per\second}
\SI{10}{\meter\per\second} to \SI{10}{\meter\per\second}|

Seems not suitable at all to travel large buffers that way.

As it happens created a tool for this purposes:

ar-forward-braced-atpt

Checked it that way

\SI{10}{\meter\per\sec|ond}
;; fill in a number of "a" in buffer
(insert (make-string 999999 97)
;; than call ar-forward-braced-atpt from above
\SI{10}{\meter\per\second}

Get a reasonable delay as isearch-forward CHAR would have.

Command is available at

https://launchpad.net/s-x-emacs-werkstatt/

Preferably via bazaar

lp:s-x-emacs-werkstatt

Re: Paredit, smartparens very slow with large latex files

[Vilibald Wanca]

> All the minor modes I've tried to navigate through sexps are very slow
> when working with large latex files (>1000 lines). For example
> sp-forward-sexp takes several seconds to do the following:
> \(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
> way to improve things ? I tried folding parts of the buffer but it
> doesn't help since the folded part is still parsed.

What about buffer narrowing, have you tried it?

Vilda

Re: Paredit, smartparens very slow with large latex files

[Julien Cubizolles]

Vilibald Wanca <vilibald.wanca@gmail.com> writes:

>> All the minor modes I've tried to navigate through sexps are very slow
>> when working with large latex files (>1000 lines). For example
>> sp-forward-sexp takes several seconds to do the following:
>> \(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
>> way to improve things ? I tried folding parts of the buffer but it
>> doesn't help since the folded part is still parsed.
>
> What about buffer narrowing, have you tried it?
 
It doesn't seem to help.

Julien.

Re: Paredit, smartparens very slow with large latex files

[Andreas Röhler]

Am 12.09.2013 22:27, schrieb Julien Cubizolles:
> Vilibald Wanca <vilibald.wanca@gmail.com> writes:
>
>>> All the minor modes I've tried to navigate through sexps are very slow
>>> when working with large latex files (>1000 lines). For example
>>> sp-forward-sexp takes several seconds to do the following:
>>> \(|\) -> \(\)| whereas it's instantaneous in a small buffer. Is there a
>>> way to improve things ? I tried folding parts of the buffer but it
>>> doesn't help since the folded part is still parsed.
>>
>> What about buffer narrowing, have you tried it?
>
> It doesn't seem to help.
>

These commands must scan-lists in order to find the end or beyond. Therefor they usually do

(save-restriction (widen)...

inside, so narrowing locally has no effect.