MacVim + SuperTab + Perl source = VERY slow

[Stanislaw Pusep]

Hi everyone!

The subject says everything, a few remarks:

1) It's NOT a SuperTab fault; Ctrl-N/Ctrl-P is slow also! However, it's easier for me to refer to the whole concept of "tab completion";

2) I use MacVim from MacPorts;

4) Text-mode vim (also from MacPorts) is fast, so it's not filesystem/libs/modules related;

5) If I start typing some local variable name and then hit tab, MacVim hangs for some seconds and then the variable name appears;

6) However, if I hit tab followed by Ctrl-C, variable name completes instantly;

7) Non-Perl (SQL, for instance) source completion is fast.

Any clues on how to debug this?

Thanks in advance!

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[Björn Winckler]

On 18 January 2012 20:20, Stanislaw Pusep wrote:

> The subject says everything, a few remarks:
>
> 1) It's NOT a SuperTab fault; Ctrl-N/Ctrl-P is slow also! However, it's
> easier for me to refer to the whole concept of "tab completion";
> 2) I use MacVim from MacPorts;
> 4) Text-mode vim (also from MacPorts) is fast, so it's not
> filesystem/libs/modules related;
> 5) If I start typing some local variable name and then hit tab, MacVim hangs
> for some seconds and then the variable name appears;
> 6) However, if I hit tab followed by Ctrl-C, variable name completes
> instantly;
> 7) Non-Perl (SQL, for instance) source completion is fast.
>
> Any clues on how to debug this?

I can reproduce and I think I know what the problem is.  I'll see what
I can do about it.

Björn

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[Stanislaw Pusep]

Great, thanks in advance!

On Wed, Jan 25, 2012 at 06:47, björn <[hidden email]> wrote:

On 18 January 2012 20:20, Stanislaw Pusep wrote:
> The subject says everything, a few remarks:
>
> 1) It's NOT a SuperTab fault; Ctrl-N/Ctrl-P is slow also! However, it's
> easier for me to refer to the whole concept of "tab completion";
> 2) I use MacVim from MacPorts;
> 4) Text-mode vim (also from MacPorts) is fast, so it's not
> filesystem/libs/modules related;
> 5) If I start typing some local variable name and then hit tab, MacVim hangs
> for some seconds and then the variable name appears;
> 6) However, if I hit tab followed by Ctrl-C, variable name completes
> instantly;
> 7) Non-Perl (SQL, for instance) source completion is fast.
>
> Any clues on how to debug this?

I can reproduce and I think I know what the problem is.  I'll see what
I can do about it.

Björn

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[Björn Winckler]

On 25 January 2012 09:47, björn wrote:

> On 18 January 2012 20:20, Stanislaw Pusep wrote:
>> The subject says everything, a few remarks:
>>
>> 1) It's NOT a SuperTab fault; Ctrl-N/Ctrl-P is slow also! However, it's
>> easier for me to refer to the whole concept of "tab completion";
>> 2) I use MacVim from MacPorts;
>> 4) Text-mode vim (also from MacPorts) is fast, so it's not
>> filesystem/libs/modules related;
>> 5) If I start typing some local variable name and then hit tab, MacVim hangs
>> for some seconds and then the variable name appears;
>> 6) However, if I hit tab followed by Ctrl-C, variable name completes
>> instantly;
>> 7) Non-Perl (SQL, for instance) source completion is fast.
>>
>> Any clues on how to debug this?
>
> I can reproduce and I think I know what the problem is.  I'll see what
> I can do about it.

So the problem was that Vim was searching through include files and
MacVim is very conservative about flushing so it would not flush until
after the search finished.  I've made it flush a bit more aggressively
now so that at least in the cases I've tried it no longer stalls.

Björn

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[Stanislaw Pusep]

Just recompiled MacVim and the completion is fast now.

Thank you very much!

On Sun, Jan 29, 2012 at 11:00, björn <[hidden email]> wrote:

On 25 January 2012 09:47, björn wrote:
> On 18 January 2012 20:20, Stanislaw Pusep wrote:
>> The subject says everything, a few remarks:
>>
>> 1) It's NOT a SuperTab fault; Ctrl-N/Ctrl-P is slow also! However, it's
>> easier for me to refer to the whole concept of "tab completion";
>> 2) I use MacVim from MacPorts;
>> 4) Text-mode vim (also from MacPorts) is fast, so it's not
>> filesystem/libs/modules related;
>> 5) If I start typing some local variable name and then hit tab, MacVim hangs
>> for some seconds and then the variable name appears;
>> 6) However, if I hit tab followed by Ctrl-C, variable name completes
>> instantly;
>> 7) Non-Perl (SQL, for instance) source completion is fast.
>>
>> Any clues on how to debug this?
>
> I can reproduce and I think I know what the problem is.  I'll see what
> I can do about it.

So the problem was that Vim was searching through include files and
MacVim is very conservative about flushing so it would not flush until
after the search finished.  I've made it flush a bit more aggressively
now so that at least in the cases I've tried it no longer stalls.

Björn

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