Re^5: counting backward (optimize foreach reverse low .. high

in reply to Re^4: counting backward (optimize foreach reverse low .. high
in thread counting backward

Maybe it's optimized for reversing arrays but not for reversing ranges:

I had to stop the second version because the swapping started to freeze my system:

lanx@nc10-ubuntu:~$ perl -e'for my $i ( 0 .. 1e8 ) { $x*=-1; $x+=$i };
+print "$x\n"' 
50000000
lanx@nc10-ubuntu:~$ perl -e'for my $i ( reverse 0 .. 1e8 ) { $x*=-1; $
+x+=$i };print "$x\n"' 
^C^C^C
lanx@nc10-ubuntu:~$ perl -version

This is perl, v5.10.0 built for i486-linux-gnu-thread-multi

...
[download]

Reversing ranges was what BUK did, but AnoMonk replied with a reference to a fix for reversing arrays!

Cheers Rolf

In Section Seekers of Perl Wisdom