I've not had an issue with performance of the I/O but here's a technique for squeezing a little more speed out of the ports without having significant code changes.
http://www.codeproject.com/Articles/732646/Fast-digital-I-O-for-Arduino
I've not had an issue with performance of the I/O but here's a technique for squeezing a little more speed out of the ports without having significant code changes.
http://www.codeproject.com/Articles/732646/Fast-digital-I-O-for-Arduino
