32 lines
1.3 KiB
Markdown
32 lines
1.3 KiB
Markdown
On this wiki, editing `templates/gitbranch.mdwn` causes a really slow
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refresh, orders of magnitude slower than a full rebuild: a large number of
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pages depend on that template, or link to a page that embeds that template,
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and so on.
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I suspect that, as with my optimization pass for `album`'s benefit, the
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costly thing is evaluating lots of pagespecs. I'm profiling it to see
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whether the problem is there are any low-hanging fruit.
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Easy to reproduce offline:
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* comment out the `exclude` option in `docwiki.setup`
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* `/usr/bin/perl -Iblib/lib ikiwiki.in -setup docwiki.setup -rebuild`
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* `touch templates/gitbranch.mdwn`
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* `/usr/bin/perl -Iblib/lib ikiwiki.in -setup docwiki.setup -refresh`
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NYTProf says:
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# spent 279s (237+41.8) within IkiWiki::bestlink which was called 13988949 times, avg 20µs/call:
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# 13150827 times (222s+37.2s) by IkiWiki::PageSpec::match_link at line 2692, avg 20µs/call
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# 829606 times (14.9s+4.51s) by IkiWiki::PageSpec::match_link at line 2687, avg 23µs/call
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...
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sub bestlink ($$) {
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which is about half the execution time (458s on my laptop).
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Adding code to log each call to match_backlink indicates that a large part
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of the problem is that it evaluates the pagespec
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`backlink(plugins/goodstuff)` up to a million times, with various pages and locations.
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--[[smcv]]
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