is strlen()'s read-4-bytes-ahead a standard?

[Xin LI]

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On 2010/07/15 15:38, deeptech71 at gmail.com wrote:
> Some C implementations use the read-4-bytes-ahead technique to speed
> up strlen(). Does the C standard state anything about strlen() being
> allowed to read past the terminating zero?

It's not 4-bytes-ahead, but read a whole (aligned) word at one time.

I think C standard does not dictate in this detail.

But why?

Cheers,
- -- 
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!	       Live free or die
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