[Mono-list] String comparisons slow

Alexander M. Batishchev abatishchev at godfather.net.ru
Thu Jul 22 01:50:58 EDT 2010

Michael, could you please clarify the difference between Ordinal and
Invariant string comparison?

-----Original Message-----
From: mono-list-bounces at lists.ximian.com
[mailto:mono-list-bounces at lists.ximian.com] On Behalf Of Michael Hutchinson
Sent: Thursday, July 22, 2010 12:29 AM
To: David S
Cc: mono-list at lists.ximian.com; wtftc
Subject: Re: [Mono-list] String comparisons slow

On Wed, Jul 21, 2010 at 3:30 PM, David S <buttink at gmail.com> wrote:
> Ok. Now I'm confused. How come "CurrentCulture" for US/ENG doesn't just
> the Ordinal??? Perhaps there are some weird alphabetizing things I just
> don't understand. BTW, Thanks for tell us about the StringComparer class.
> never knew that existed.

Note also that some string methods have overloads for taking specific
cultures, or the StringComparison enum. Both StringComparison.Ordinal
and StringComparison.OrdinalIgnoreCase (as well as StringComparer) can
be very useful to improve performance when culture-dependent behaviour
is not needed or desirable.

Culture-dependent string comparisons are a very complex topic. There's
also an "invariant" culture for doing things in a culture-independent

Michael Hutchinson
Mono-list maillist  -  Mono-list at lists.ximian.com

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