Branch: refs/heads/blead
Home: https://github.com/Perl/perl5
Commit: 3fbcd66ed6e3ed3daaa2265d1a8a905f7ee0bade
https://github.com/Perl/perl5/commit/3fbcd66ed6e3ed3daaa2265d1a8a905f7ee0bade
Author: bulk88 <[email protected]>
Date: 2025-10-18 (Sat, 18 Oct 2025)
Changed paths:
M pp_hot.c
Log Message:
-----------
pp_hot.c: shave off some CPU instructions in pp_const()
CC is MSVC 2022 x64 -O1. Before, 0x67 bytes long. After, 0x5E bytes long.
This savings obtained by not digging inside PL_op AKA my_perl->Iop->op_***
twice, and the CC not having save a C auto var around a function call.
I profiled Perl_pp_const() to be between #2 to #4 most executed pp_*()
function, per process on any workload. For extra details about this commit
see the GH PR associated with this commit.
There is an alternative I privately prototyped but I decided not to
finish 3/4s of the way which is creating pre/post arg eval variants of
function/macro rpp_xpush_1(). It was getting too invasive and complex by
lines of src code modified to finish, so that conceptual fix isn't done
here, and something best left for the future.
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