On Wed, Feb 27, 2013 at 7:33 AM, Adam Dinwoodie <Adam.Dinwoodie@metaswitch.com> wrote: > Andrey Repin wrote: >> I was need to pipe some bytes through application and watch it's reaction. >> But with /dev/urandom the stream speed is only about 40Mb/sec. Using >> /dev/zero, however, makes it 3 orders of magnitude faster (~35Gb/s), but for >> technical reasons, using monotonous sequence is highly undesirable. Is there >> any more performant source of non-monotonous byte sequences available to >> Cygwin? I would be pretty happy even with sequential bytes, I think. Only two >> reservations are good performance (something around 100 Mb/sec or more would >> suffice) and a degree of randomness. >You could also copy one of the simple random number generators from http://en.wikipedia.org/wiki/Linear_congruential_generator. For example, a simple one is x(n+1) = (1664525 * x(n) + 1013904223) mod 2^32 Alan Thompson -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple