Re: [RFTesters] Make portable sgetn/1-in and 1-io tests

[Paolo Carlini <pcarlini at unitus dot it>]

Nathan Myers wrote:

> My experiments suggested that 8192 really is (still) optimal, among 
> powers of 2, on a P3 at 1.4 GHz and a P2 at 300 MHz, for the case of 
> _CharT=char.  8K was surprisingly better than 32K and 64K, and slightly 
> better than 4K, a fact that must be connected to the size of L1 cache.  
> I didn't try wchar_t.  
>
> Nonetheless, I wonder if the default buffer size for filebuf should be 
> BUFSIZ/sizeof(_CharT), or 2K for wchar_t.  It seems worth making the 
> change until somebody does the measurements and tells us to change it.
I see, thanks.

Interestingly, it looks like many systems actually use BUFSIZ ~ 1024 or 
< 8192:

   http://www.pimpworks.org/security/telnetd.txt

Paolo.