This is no surprise, regexp is a relatively heavy function, a lot of dirty work behind the scene.
On Thu, Apr 16, 2009 at 2:13 PM, John W. Krahn <jwkr...@shaw.ca> wrote: > Emen Zhao wrote: > >> This is off topic. But I'm just curious about why "4096" is picked here. >> Is >> there any particular reason behind it? I guess you can even calc the lines >> like this - >> perl -0777 -wne 'print scalar ($_=~s/\n//g)' filename >> > > Except that it's slower than using tr///: > > $ time perl -ln0777e'print s/\n//g' < /usr/share/dict/words > 98569 > > real 0m0.160s > user 0m0.092s > sys 0m0.016s > $ time perl -ln0777e'print tr/\n//' < /usr/share/dict/words > 98569 > > real 0m0.041s > user 0m0.012s > sys 0m0.012s > > > > John > -- > Those people who think they know everything are a great > annoyance to those of us who do. -- Isaac Asimov > > -- > To unsubscribe, e-mail: beginners-unsubscr...@perl.org > For additional commands, e-mail: beginners-h...@perl.org > http://learn.perl.org/ > > >
