JAX London 2017 Session: Maurice Naftalin - Complicating Complexity: Algorithm Performance скачать в хорошем качестве

JAX London 2017 Session: Maurice Naftalin - Complicating Complexity: Algorithm Performance

It’s no simple matter to explain the performance of even a simple Java program, when instruction execution time is often overshadowed by other costs. Even when network and IO have been taken into account, two programs with similar computational complexity—their big-O characteristics—can differ in cache usage, with big resulting differences in performance. For the Java programmer, this means that big-O analysis no longer gives enough guidance in choosing a collection implementation for performance-critical code. In this talk we’ll explore optimization of the memory layout and performance of some simple programs via alternative collection implementations and frameworks, and the open-source ObjectLayout library. Filmed at JAX London 2017.