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Re: 1.7] BUG - GREP slows to a crawl with large number of matches on a single file
Jim Reisert wrote:
>On Fri, Nov 6, 2009 at 7:12 AM, Cooper, Karl (US SSA)
>> Corinna Vinschen wrote:
>>> Or try LANG=C.ASCII since LANG=C will still return UTF-8 as charset
>>> when calling nl_langinfo(CHARSET).
>> Yes, this solves it:
>> $ time LC_ALL=C.ASCII grep dog testfile | wc
>> 100000 900000 4500000
>> real 0m0.359s
>> user 0m0.279s
>> sys 0m0.232s
> I just tried this on my system, I routinely grep groups of files
> containing 100K lines. I was *astounded* how fast "grep" is after
> setting LC_ALL=C.ASCII !
The second run of grep is usually much faster due to disk buffering.
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