I ran into an odd issue... the workaround is easy enough but the issue is weird.
In case this relevant, my grep coms from git bash. (which I think is mostly
Cygwin? (or maybe msys2??))
Anyway, grep -P doesn't work if no LC vars are set, and complains that it only
works in unibyte locales or UTF-
Re: how am I doing that ... via bash, just like the way you suggested I run
"locale" the second time:
LC_CTYPE=C.UTF-8 grep -P needle haystack.txt # just CTYPE seems to be enough,
no need for ALL
Re: output difference for locale:
First way, everything is C.UTF-8 except LANG and LC_ALL, which ar
Re: debugger: will that work if grep wasn't built with debug symbols? I think
this one wasn't.
-Original Message-
From: Paul Eggert
Sent: Friday, August 9, 2024 5:57 PM
To: Yagnatinsky, Mark : IT (NYK)
Cc: 72...@debbugs.gnu.org
Subject: Re: bug#72524: how does grep determine locale if
Yeah but that would involve compiling the SAME WAY that this one was compiled,
and I have no idea how the Git Bash for Windows project does this kind of thing.
I tried it on a grep in a more full-featured distribution (namely MSYS2) and it
works fine.
I'm tempted to try it on a different computer
I suspected as much... I'll try to get my other one working then.
-Original Message-
From: Paul Eggert
Sent: Friday, August 9, 2024 6:10 PM
To: Yagnatinsky, Mark : IT (NYK)
Cc: 72...@debbugs.gnu.org
Subject: Re: bug#72524: how does grep determine locale if no LC environment
variables a
I checked; it's happens on Git for Windows on the other computer too.
Must be something with how they implemented locals.
Thanks!
-Original Message-
From: Yagnatinsky, Mark : IT (NYK)
Sent: Friday, August 9, 2024 6:12 PM
To: Paul Eggert
Cc: 72...@debbugs.gnu.org
Subject: RE: bug#72524: h
This page: https://www.gnu.org/software/grep/manual/html_node/Performance.html
discusses how to get good performance out of grep.
That is nice, but the perf advice focuses almost entirely on speed.
I'm more interested in how to avoid excessive memory usage.
After a bit of research, it seems that on
Thanks!!
Re: wouldn't help much: maybe it wouldn't help with speed.
But how could it possibly not help with memory usage?
In particular, the "commit charge" is surely far lower, right?
With a read() based approach, grep needs to explicitly allocate an array, and
as far as the kernel knows, this ar
Okay, that's a surprise. I had assumed the buffer would be mapped read-only.
If indeed it needs to modify the buffer then even the memory gains start to
look marginal.
Thanks for explaining where my assumptions were wrong, and thanks also for
confirming the parts that were right. I now know tha
