Dealing with very large binary files

[sebastian.harko]

Helllo,

What's the general accepted strategy for dealing with very large
binary files in C# ?
I have to do a program that reads some "multi frame bitmap " files
which can reach up to one hundred megs so I need to know how to
optimize reading a file..

Best regards,
Seb

[Peter Duniho]

se*************@gmail.com wrote:

What's the general accepted strategy for dealing with very large
binary files in C# ?

Very large binary files? Read a little bit at a time.

I have to do a program that reads some "multi frame bitmap " files
which can reach up to one hundred megs so I need to know how to
optimize reading a file..

Oh. I thought you were asking about "very large binary files". These
days, 100MB isn't really all that big. :)

That said, you are likely to find that the most important issue is to
make sure you read enough data at one time. You can use a
BufferedStream to ensure this, but my experience has been that even
FileStream has some built-in buffering (caching at the OS level) that
results in pretty good performance anyway.

Do you have a specific issue that is coming up in which performance is
not satisfactory? Generally, it's better to not waste time optimizing
until you know what performance problem you're trying to solve. Until
you have an actual performance problem, you can't answer that.

Pete

[Jonathan Wood]

It really depends on what you will do with those files. But you might check
out memory-mapped files.

--
Jonathan Wood
SoftCircuits Programming
http://www.softcircuits.com

<se*************@gmail.comwrote in message
news:11*********************@57g2000hsv.googlegrou ps.com...

Helllo,

What's the general accepted strategy for dealing with very large
binary files in C# ?
I have to do a program that reads some "multi frame bitmap " files
which can reach up to one hundred megs so I need to know how to
optimize reading a file..

Best regards,
Seb

[Ignacio Machin \( .NET/ C# MVP \)]

HI,

<se*************@gmail.comwrote in message
news:11*********************@57g2000hsv.googlegrou ps.com...

Helllo,

What's the general accepted strategy for dealing with very large
binary files in C# ?

Depend of your escenario and of the kind of processing you need to do.

I have to do a program that reads some "multi frame bitmap " files
which can reach up to one hundred megs so I need to know how to
optimize reading a file..

And do what with them? As I said depending of your intended action will be
the best way of handling it