Efficiently reading bytes from a FileStream

[James Dean]

I create a new filestream and then i move i use the readbyte function
and the position function when required. These seem to be cripplingly
slow for some reason. This readbyte maybe is the problem. Do i need to
use a binaryReader with this in order for it to be faster?. I am
manipulating a compressed image file. Because i am reading in so many
bytes it makes it inefficient. Could somebody have a suggestion as how
to remedy this problem.

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[Niki Estner]

You should use the Stream.Read function, reading blocks of at least a few
thousand bytes at a time. System calls take time. Using one per byte *is*
cripplingly slow. If you really want to use the "readbyte" function, use a
System.IO.BufferedStream. This will at least buffer the system calls - but
you would still have one method call per byte.

Niki

"James Dean" <m_*******@yahoo.com> wrote in
news:ub**************@TK2MSFTNGP12.phx.gbl...

I create a new filestream and then i move i use the readbyte function
and the position function when required. These seem to be cripplingly
slow for some reason. This readbyte maybe is the problem. Do i need to
use a binaryReader with this in order for it to be faster?. I am
manipulating a compressed image file. Because i am reading in so many
bytes it makes it inefficient. Could somebody have a suggestion as how
to remedy this problem.

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[Scott Allen]

Try Jon's code and explanation:

http://www.yoda.arachsys.com/csharp/readbinary.html

--
Scott
http://www.OdeToCode.com

On Tue, 06 Jul 2004 02:05:07 -0700, James Dean <m_*******@yahoo.com>
wrote:

I create a new filestream and then i move i use the readbyte function
and the position function when required. These seem to be cripplingly
slow for some reason. This readbyte maybe is the problem. Do i need to
use a binaryReader with this in order for it to be faster?. I am
manipulating a compressed image file. Because i am reading in so many
bytes it makes it inefficient. Could somebody have a suggestion as how
to remedy this problem.

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[James Dean]

Hey i used the function that he recommended in that page you gave me. I
just want to say thanks alot it has really helped enormously......

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