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updated for version 7.4.497

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Problem:    With some regexp patterns the NFA engine uses many states and
            becomes very slow.  To the user it looks like Vim freezes.
Solution:   When the number of states reaches a limit fall back to the old
            engine. (Christian Brabandt)
This commit is contained in:
Bram Moolenaar
2014-11-05 14:27:36 +01:00
parent 4f7e821f26
commit fda3729a06
14 changed files with 244 additions and 45 deletions
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runtime/doc/options.txt
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@@ -5626,6 +5626,10 @@ A jump table for the options with a short description can be found at |Q_op|.
Note that when using the NFA engine and the pattern contains something
that is not supported the pattern will not match. This is only useful
for debugging the regexp engine.
Using automatic selection enables Vim to switch the engine, if the
default engine becomes too costly. E.g., when the NFA engine uses too
many states. This should prevent Vim from hanging on a combination of
a complex pattern with long text.
*'relativenumber'* *'rnu'* *'norelativenumber'* *'nornu'*
'relativenumber' 'rnu' boolean (default off)