parsers: optimize filtered headrevs logic
The old native head revs logic would iterate over every node, starting from 0,
and check if every node was filtered (by testing it against the filteredrevs
python set). On large repos with hundreds of thousands of commits, this could
take 150ms.
This new logic iterates over the nodes in reverse order, and skips the filtered
check if we've seen an unfiltered child of the node. This saves approximately a
bagillion filteredrevs set checks, which shaves the time down from 150ms to
20ms during every branch cache write.
#require serve
$ hgserve()
> {
> hg serve -a localhost -d --pid-file=hg.pid -E errors.log -v $@ \
> | sed -e "s/:$HGPORT1\\([^0-9]\\)/:HGPORT1\1/g" \
> -e "s/:$HGPORT2\\([^0-9]\\)/:HGPORT2\1/g" \
> -e 's/http:\/\/[^/]*\//http:\/\/localhost\//'
> cat hg.pid >> "$DAEMON_PIDS"
> echo % errors
> cat errors.log
> killdaemons.py hg.pid
> }
$ hg init test
$ cd test
$ echo '[web]' > .hg/hgrc
$ echo 'accesslog = access.log' >> .hg/hgrc
$ echo "port = $HGPORT1" >> .hg/hgrc
Without -v
$ hg serve -a localhost -p $HGPORT -d --pid-file=hg.pid -E errors.log
$ cat hg.pid >> "$DAEMON_PIDS"
$ if [ -f access.log ]; then
> echo 'access log created - .hg/hgrc respected'
> fi
access log created - .hg/hgrc respected
errors
$ cat errors.log
With -v
$ hgserve
listening at http://localhost/ (bound to 127.0.0.1:HGPORT1)
% errors
With -v and -p HGPORT2
$ hgserve -p "$HGPORT2"
listening at http://localhost/ (bound to 127.0.0.1:HGPORT2)
% errors
With -v and -p daytime (should fail because low port)
#if no-root
$ KILLQUIETLY=Y
$ hgserve -p daytime
abort: cannot start server at 'localhost:13': Permission denied
abort: child process failed to start
% errors
$ KILLQUIETLY=N
#endif
With --prefix foo
$ hgserve --prefix foo
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
With --prefix /foo
$ hgserve --prefix /foo
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
With --prefix foo/
$ hgserve --prefix foo/
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
With --prefix /foo/
$ hgserve --prefix /foo/
listening at http://localhost/foo/ (bound to 127.0.0.1:HGPORT1)
% errors
$ cd ..