Hi list,
I noticed that using Vim 7.4a the Vimwiki plugin works measurably slower with
re=0 than with re=1. I figured out the reason is this regexp in the syntax
definition:
[[:alnum:]]\@<!\%(\%(\%(http\|https\|file\|ftp\|gopher\|telnet\|nntp\|ldap\|rsync\|imap\|pop\|irc\|ircs\|cvs\|svn\|svn+ssh\|git\|ssh\|fish\|sftp\):\%(\/\/\)\)\|\%(mailto\|news\|xmpp\|sip\|sips\|doi\|urn\|tel\):\)\S\{-1,}\%(([^
\t()]*)\)\=\S*
You may know what it is supposed to match.
Removing some of the branches makes it faster and so does removing
[[:alnum:]]\@<!
I don't know if there is a standard method for measuring speed of the syntax
highlight, but here is what I have done:
- open a relatively large file
- :set syn=off
- :syntax match Number
/[[:alnum:]]\@<!\%(\%(\%(http\|https\|file\|ftp\|gopher\|telnet\|nntp\|ldap\|rsync\|imap\|pop\|irc\|ircs\|cvs\|svn\|svn+ssh\|git\|ssh\|fish\|sftp\):\%(\/\/\)\)\|\%(mailto\|news\|xmpp\|sip\|sips\|doi\|urn\|tel\):\)\S\{-1,}\%(([^
\t()]*)\)\=\S*/
- scroll with <c-e> and <c-y>
- extremely slow with re=0 but normal slow (*wink*) with re=1
So, can this behavior be considered as a bug?
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