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

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

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Re^6: counting backward (optimize foreach reverse low .. high by dave_the_m (Monsignor) on Mar 02, 2013 at 17:37 UTC
Maybe it's optimized for reversing arrays but not for reversing ranges: But the post of yours which I replied to explicitly showed @a as an example, not a range. I never claimed ranges were optimised, while you implied that arrays weren't. Dave.	[reply]
Re^6: counting backward (optimize foreach reverse low .. high by Anonymous Monk on Mar 02, 2013 at 16:24 UTC
Reversing ranges was what BUK did, but AnoMonk replied with a reference to a fix for reversing arrays! As a suggestion to fix range operator	[reply]