Spy performs *much* better for us, but our needs might be different from yours. We're running in a _highly_ concurrent environment-- most of our front-end machines are 32 or 64 core SunFire CMT machines. (T1000, T5120, etc)
But, yes, if you search the archives, there has been some extensive performance testing in this arena. Start here: http://blogs.sun.com/elambert/entry/memcached_java_client_performance_on http://blogs.sun.com/elambert/entry/memcached_java_client_performance_on1 I also find the Spy client to be much nice to work with at the API level. Plus, I love asynchronous operations. -- awl
