Timeline for How to make grep ignore lines without trailing newline character

8 events

when toggle format	what		by	license	comment
Jun 13, 2018 at 18:49	comment	added	ilkkachu		@dshin, allright, just goes to show that Perl's regex processing is pretty well optimized
Jun 13, 2018 at 18:44	comment	added	dshin		Hm, your original actually is clocking in slightly faster for me, but they are very close.
Jun 13, 2018 at 18:42	comment	added	ilkkachu		@dshin, also, since you're aiming for speed, you could try if replacing the second regex with `... && substr($_, -1, 1) eq "\n"'` would be faster.
Jun 13, 2018 at 18:42	vote	accept	dshin
Jun 13, 2018 at 18:39	comment	added	ilkkachu		@dshin, Perl regexes are pretty much an extension of extended regexes like what `grep -E` uses, so `this\|that` works out of the box. (see this question and Perl's docs for details)
Jun 13, 2018 at 18:35	comment	added	dshin		Thanks, I like the perl solution. It appears to be within a factor of 2 of the speed of grep, which is faster than sed/python/gawk solutions. Is there a simple way to extend it to do the equivalent of `egrep "pattern1\|pattern2\|pattern3"`?
Jun 13, 2018 at 18:24	history	edited	ilkkachu	CC BY-SA 4.0	added 44 characters in body
Jun 13, 2018 at 18:19	history	answered	ilkkachu	CC BY-SA 4.0