* Performance problem with keyboard macros and C-n
@ 2020-11-10 0:18 Robert Thorpe
2020-11-11 22:56 ` Daniel Martín
0 siblings, 1 reply; 2+ messages in thread
From: Robert Thorpe @ 2020-11-10 0:18 UTC (permalink / raw)
To: help-gnu-emacs
On Reddit someone pointed to a performance problem with a keyboard
macro. I investigated it a bit more and found that it was caused by an
interaction between C-n and some programming modes.
Basically, the macro is extremely slow if C-n is used to move between
lines and the macro is run in python-mode or c-mode. However, it is
very fast if fundamental-mode is used or if forward-line is used to move
to the next line. It is also very fast if apply-macro-to-region-lines
is used.
Is this a known performance bug, or should I open a bug report?
BR,
Robert Thorpe
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Performance problem with keyboard macros and C-n
2020-11-10 0:18 Performance problem with keyboard macros and C-n Robert Thorpe
@ 2020-11-11 22:56 ` Daniel Martín
0 siblings, 0 replies; 2+ messages in thread
From: Daniel Martín @ 2020-11-11 22:56 UTC (permalink / raw)
To: Robert Thorpe; +Cc: help-gnu-emacs
Robert Thorpe <rt@robertthorpeconsulting.com> writes:
> On Reddit someone pointed to a performance problem with a keyboard
> macro. I investigated it a bit more and found that it was caused by an
> interaction between C-n and some programming modes.
>
> Basically, the macro is extremely slow if C-n is used to move between
> lines and the macro is run in python-mode or c-mode. However, it is
> very fast if fundamental-mode is used or if forward-line is used to move
> to the next line. It is also very fast if apply-macro-to-region-lines
> is used.
>
> Is this a known performance bug, or should I open a bug report?
>
> BR,
> Robert Thorpe
I think it's better to open a bug report with a detailed recipe to
reproduce the performance problem. Thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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