stablerange: report progress more often in slow case
For small repositories the time spent in progress was problematic. However on
large repository it quickly becomes negligible, so we add a way to detect this
case and report more often in this case.
#require test-repo pyflakes
Copied from Mercurial core (60ee2593a270)
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg locate 'set:(**.py or grep("^#!.*python")) - removed()' 2>/dev/null \
> | xargs pyflakes 2>/dev/null