Ævar Arnfjörð Bjarmason 17530b2ed2 perl: nano-optimize by replacing Cwd::cwd() with Cwd::getcwd() ... It has been pointed out[1] that cwd() invokes "pwd(1)" while getcwd() is a Perl-native XS function. For what we're using these for we can use getcwd(). The performance difference is miniscule, we're saving on the order of a millisecond or so, see [2] below for the benchmark. I don't think this matters in practice for optimizing git-send-email or perl execution (unlike the patches leading up to this one). But let's do it regardless of that, if only so we don't have to think about this as a low-hanging fruit anymore. 1. https://lore.kernel.org/git/20210512180517.GA11354@dcvr/ 2. $ perl -MBenchmark=:all -MCwd -wE 'cmpthese(10000, { getcwd => sub { getcwd }, cwd => sub { cwd }, pwd => sub { system "pwd >/dev/null" }})' (warning: too few iterations for a reliable count) Rate pwd cwd getcwd pwd 982/s -- -48% -100% cwd 1890/s 92% -- -100% getcwd 10000000000000000000/s 1018000000000000000% 529000000000000064% - Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2021-05-28 18:38:07 +09:00
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Git.pm	perl: nano-optimize by replacing Cwd::cwd() with Cwd::getcwd()	2021-05-28 18:38:07 +09:00