Re: strcspn(3) complexity improvement

From: Peter Jeremy (PeterJeremy_at_optushome.com.au)
Date: 03/31/05

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    Date: Thu, 31 Mar 2005 21:25:49 +1000
To: Brooks Davis <brooks@one-eyed-alien.net>

    On Wed, 2005-Mar-30 10:31:45 -0800, Brooks Davis wrote:
    >The real question I have is, how long does the string need to be before
    >this is a win and how much does it hurt for typical string lengths?
    >I've written code with strcspn that needed to perform well, but it was
    >parsing 80-column punch card derived formats.

    I was thinking about this last night. The easy way is to generate random
    "string" and "charset" arrays of varying length and time both strcspn()
    variants - this gives you two two-dimensional surfaces showing timing
    vs argument size. The difficulty is visualising the result and
    deciding whether pairs of random strings are realistic. 

    -- 
Peter Jeremy
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