Re^6: 5.42: Does m// toss a string around?

[Anonymous Monk]

And so as not to mention 5.18 again, and I'm not advocating the use of s/// as below but FWIW:

$ perlbrew exec --with 5.18.4,5.42.0 time -p perl -e '
>   $_ = 1 x 1e6;
>   1 while s/.$//;
> '
perl-5.18.4
==========
real 0.14
user 0.13
sys 0.00

perl-5.42.0
==========
real 18.95
user 18.94
sys 0.00