tfa/vim-log-highlighting
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Optimize Syslog date rule using keywords in place of combinations

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The previous rule used combinations of Day and Month three letter terms,
and was taking up about 30% of the syntax processing time.
The new methods using keywords has the side effect of highlighting the
three letter identifies in the whole file (they should be reasonably
rare outside of dates, however) but is much faster
This commit is contained in:
MTDL9
2020-08-30 09:10:11 +02:00
parent 5ce7cb9908
commit 1037e26f31
1 changed files with 4 additions and 2 deletions
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6
syntax/log.vim
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@@ -43,8 +43,9 @@ syn region logString start=/'\(s \|t \| \w\)\@!/ end=/'/ end=/$/ end=/s / s
syn match logDate '\d\{2,4}[-\/]\(\d\{2}\|Jan\|Feb\|Mar\|Apr\|May\|Jun\|Jul\|Aug\|Sep\|Oct\|Nov\|Dec\)[-\/]\d\{2,4}T\?'
" Matches 8 digit numbers at start of line starting with 20
syn match logDate '^20\d\{6}'
" Matches Fri Jan 09 or Feb 11 or Apr 3
syn match logDate '\(\(Mon\|Tue\|Wed\|Thu\|Fri\|Sat\|Sun\) \)\?\(Jan\|Feb\|Mar\|Apr\|May\|Jun\|Jul\|Aug\|Sep\|Oct\|Nov\|Dec\) [0-9 ]\d'
" Matches Fri Jan 09 or Feb 11 or Apr 3 or Sun 3
syn keyword logDate Mon Tue Wed Thu Fri Sat Sun Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec nextgroup=logDateDay
syn match logDateDay '\s\{1,2}\d\{1,2}' contained
" Matches 12:09:38 or 00:03:38.129Z or 01:32:12.102938 +0700
syn match logTime '\d\{2}:\d\{2}:\d\{2}\(\.\d\{2,6}\)\?\(\s\?[-+]\d\{2,4}\|Z\)\?\>' nextgroup=logTimeZone,logSysColumns skipwhite
@@ -112,6 +113,7 @@ hi def link logNull Constant
hi def link logString String
hi def link logDate Identifier
hi def link logDateDay Identifier
hi def link logTime Function
hi def link logTimeZone Identifier