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bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x)
From: |
Jim Meyering |
Subject: |
bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales |
Date: |
Wed, 19 Feb 2014 11:51:27 -0800 |
On Wed, Feb 19, 2014 at 10:30 AM, Paul Eggert <address@hidden> wrote:
> While we're on the topic, can someone please say why that patch was done as
> a preprocessor for the regex code? I normally would think that the way to
> speed up regex processing is to improve dfa.c and/or the regex library, as
> that should speed up all programs that use these modules, not just grep.
Hi Paul,
My patch was a first crack at dealing with an inefficiency that was
grep-specific, so it made sense to apply as a grep-specific preprocessing
phase. Norihiro found an additional improvement, that, it so happens,
would have had an even bigger impact if my patch had not been applied first.
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Norihiro Tanaka, 2014/02/19
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Paul Eggert, 2014/02/19
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales,
Jim Meyering <=
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/19
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Paul Eggert, 2014/02/19
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/19
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/20
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, arnold, 2014/02/20
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/20
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/20
- bug#16232: [PATCH] grep: make --ignore-case (-i) faster (sometimes 10x) in multibyte locales, Jim Meyering, 2014/02/20
- Message not available
- bug#16893: [PATCH] Avoid matching line-by-line for case-insensitive with grep, Glenn Morris, 2014/02/27
- bug#16893: [PATCH] Avoid matching line-by-line for case-insensitive with grep, Jim Meyering, 2014/02/27