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| author | demerphq <demerphq@gmail.com> | 2009-10-15 14:27:30 +0100 |
|---|---|---|
| committer | Nicholas Clark <nick@ccl4.org> | 2009-10-15 14:27:30 +0100 |
| commit | 867fa1e2da145229b4db2c6e8d5b51700c15f114 (patch) | |
| tree | 83fd35002b63cf9db21ebf85cfa939ebaa370f1b /pp.sym | |
| parent | 1c85afcecc8ee030e2780aa5bfa85692c8db64df (diff) | |
| download | perl-867fa1e2da145229b4db2c6e8d5b51700c15f114.tar.gz | |
Optimise if (%foo) to be faster than if(keys %foo)
Thread was "[PATCH] Make if (%hash) {} act the same as if (keys %hash) {}"
http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2006-11/msg00432.html
but the implementation evolved from the approach described in the subject, to
instead add a new opcode pp_boolkeys, to exactly preserve the existing
behaviour.
Various conflicts with the passage of time resolved, 'register' removed, and a
$VERSION bump.
Diffstat (limited to 'pp.sym')
| -rw-r--r-- | pp.sym | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -408,5 +408,6 @@ Perl_pp_getlogin Perl_pp_syscall Perl_pp_lock Perl_pp_once +Perl_pp_boolkeys # ex: set ro: |