The subdirectories in this directory provide a number of benchmarks that use ACE features to determine performance of various concurrency and communication mechanisms. . Synch-Benchmarks -- Implements a number of benchmarks that test the performance of various synchronization mechanisms. . TTCP -- Implements several variants of the TTCP benchmarking test for TCP and UCP using C sockets and ACE C++ wrappers. . UDP -- Contains UDP test, which measures UDP round-trip performance. . Misc -- Miscellaneous tests, e.g., Double-Checked Locking, context switching, mutexes, naming, etc.