[erlang-questions] Slow UTP packets

Rob Elsner <>
Thu Jul 30 14:58:13 CEST 2009


I am doing nearly an identical thing and record a 35Mbps multicast UDP
stream (~4MB/s) just fine.  The difference is I don't use io:write, I
use file:write.  I've had the file in raw mode and that works as well.
 I also use delayed_write, but in either case it works fine.

I think you might be hitting an issue using io:write.  Is there a
chance you can use file:write and see how that performs?

Rob

On Thu, Jul 30, 2009 at 6:29 AM, Ovidiu Deac<> wrote:
> Hi everybody,
>
> I want to do some speed tests for parsing packets and I wrote a small
> program which receives data on a multicast address and writes it to a
> file. While this application is running I measure the growing speed of
> the output file to get an idea about the speed.


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