Re: Performance of the Streams 'Read and 'Write

["Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>]

Gautier write-only wrote:
> 
> Naively, you would say it is even slower: you do even more by copying
> a buffer into another one, right ?
> Indeed, not at all, it is *lots* faster (on GNAT and ObjectAda)!
> To give an idea, the variant 1 applied to a bzip2 decompressor makes
> it 4x slower than the C version, and variant 2 makes it only 7%
> slower! With only I/O (like copying a file) you would get an even much
> larger difference.

And if you overlay the Stream_Element_Array onto the Buffer, thus eliminating 
the copying and the stream attribute operations?

-- 
Jeff Carter
"C's solution to this [variable-sized array parameters] has real
problems, and people who are complaining about safety definitely
have a point."
Dennis Ritchie
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