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Diffstat (limited to 'doc/emacs')
| -rw-r--r-- | doc/emacs/emacs.texi | 1 | ||||
| -rw-r--r-- | doc/emacs/trouble.texi | 59 |
2 files changed, 0 insertions, 60 deletions
diff --git a/doc/emacs/emacs.texi b/doc/emacs/emacs.texi index 5e72699bbe8..b43c966f872 100644 --- a/doc/emacs/emacs.texi +++ b/doc/emacs/emacs.texi @@ -1190,7 +1190,6 @@ Dealing with Emacs Trouble * Crashing:: What Emacs does when it crashes. * After a Crash:: Recovering editing in an Emacs session that crashed. * Emergency Escape:: What to do if Emacs stops responding. -* Long Lines:: Mitigating slowness due to extremely long lines. * DEL Does Not Delete:: What to do if @key{DEL} doesn't delete. Reporting Bugs diff --git a/doc/emacs/trouble.texi b/doc/emacs/trouble.texi index f06b93759d8..887e5c6170f 100644 --- a/doc/emacs/trouble.texi +++ b/doc/emacs/trouble.texi @@ -158,7 +158,6 @@ Emacs. * Crashing:: What Emacs does when it crashes. * After a Crash:: Recovering editing in an Emacs session that crashed. * Emergency Escape:: What to do if Emacs stops responding. -* Long Lines:: Mitigating slowness due to extremely long lines. * DEL Does Not Delete:: What to do if @key{DEL} doesn't delete. @end menu @@ -433,64 +432,6 @@ program. emergency escape---but there are cases where it won't work, when a system call hangs or when Emacs is stuck in a tight loop in C code. -@node Long Lines -@subsection Long Lines -@cindex long lines - - For a variety of reasons (some of which are fundamental to the Emacs -redisplay code and the complex range of possibilities it handles; -others of which are due to modes and features which do not scale well -in unusual circumstances), Emacs can perform poorly when extremely -long lines are present (where ``extremely long'' usually means at -least many thousands of characters). - -@cindex @code{so-long} mode -@findex global-so-long-mode -@vindex so-long-action - A particular problem is that Emacs may ``hang'' for a long time at -the point of visiting a file with extremely long lines. This can be -mitigated by enabling the @file{so-long} library, which detects when a -visited file contains abnormally long lines, and takes steps to -disable features which are liable to cause slowness in that situation. -To enable this library, type @kbd{M-x global-so-long-mode @key{RET}}, -or turn on the @code{global-so-long-mode} in your init file -(@pxref{Init File}), or customize the @code{global-so-long-mode} -option. You can tailor this mode's operation by customizing the -variable @code{so-long-action}. - - The @file{so-long} library can also significantly improve -performance when moving and editing in a buffer with long lines. -Performance is still likely to degrade as you get deeper into the long -lines, but the improvements from using this library can nevertheless -be substantial. - -@findex so-long-commentary - Use @kbd{M-x so-long-commentary} to view the documentation for this -library and learn more about how to enable and configure it. - -@vindex max-redisplay-ticks - If even @code{so-long-mode} doesn't help making Emacs responsive -enough, or if you'd rather not disable the display-related features -that @code{so-long-mode} turns off, you can instead customize the -variable @code{max-redisplay-ticks} to a non-zero value. Then Emacs -will abort redisplay of a window and commands, like @kbd{C-n} and -@kbd{M-v}, which use the display code to do their job, if processing a -window needs more low-level display operations than the value of this -variable. The display of the offending window will then remain -outdated, and possibly incomplete, on the screen, but Emacs should -otherwise be responsive, and you could then switch to another buffer, -or kill the problematic buffer, or turn on @code{so-long-mode} or -@code{so-long-minor-mode} in that buffer. When the display of a -window is aborted due to this reason, the buffer shown in that window -will not have any of its windows redisplayed until the buffer is -modified or until you type @kbd{C-l} (@pxref{Recentering}) in one of -that buffer's windows. - - If you decide to customize this variable to a non-zero value, we -recommend to use a value between 100,000 and 1,000,000, depending on -your patience and the speed of your system. The default value is -zero, which disables this feature. - @node DEL Does Not Delete @subsection If @key{DEL} Fails to Delete @cindex @key{DEL} vs @key{BACKSPACE} |