[vim/vim] :tag takes ages with ignorecase (Issue #18838)
dzwdz
dzwdz created an issue (vim/vim#18838)Steps to reproduce
- Get a large C codebase - I was using a recent kernel tarball.
- Generate tags with e.g.
ctags -R .. - Open Vim,
:set ignorecase,:tag ip_mreq(the specific tag doesn't matter).
The lookup will take a few seconds.
This can also be tested with:
time vim -Nu NONE -t ip_mreq +q(0.06s on my machine)time vim -Nu NONE --cmd "set ignorecase" -t ip_mreq +q(~4s)
Expected behaviour
In general I expect the tag lookups to be instant.
They are indeed instant if I regenerate the tags file with --sort=foldcase or set noignorecase, but you don't get any signal that you're doing something wrong if you don't do that. I just thought Vim's tags implementation was crap up until now :P
Maybe Vim could display a warning if it has to fallback to linear search on the tags file?
Version of Vim
9.1, Included patches: 1-948, 950-1230, 1242, 1244
Environment
- Debian 13.2
- vim package version 2:9.1.1230-2
- universal-ctags package version 5.9.20210829.0-2
Logs and stack traces
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Christian Brabandt
chrisbra left a comment (vim/vim#18838)There is a bit of context here: :h 'tagbsearch' Make sure to follow the related options.
I am not sure echoing the particular search method is much of help, especially when using a small tag file, so this may turn out to be more annoying than useful after all.
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