perl 5.8.8
$ time perl -e 'for ($i = 0; $i <= 100000000; $i++) { }'
7.65 real 7.63 user 0.00 sys
$ time perl -e 'for ($i = 0; $i < 100000001; $i++) { }'
6.19 real 6.18 user 0.00 sys
$ time perl -e 'for $i (0 .. 100000000) { }'
4.16 real 4.15 user 0.00 sys