Java EE 8 High Performance

Using handlers

When dealing with performance, it is important to define the trade-off you want in terms of logging. An interesting metric can be to compare the application without any active logging statement versus the ones you want to keep (for production). If you identify that the performance drastically decreases with logging activated, then you probably have a configuration issue, either in one of the logging layers or—more commonly—with the backend usage (such as overusing a remote database).

The handler, being the part exiting the application, is the one requiring most of the attention. This doesn't mean other layers are not important, but they are generally faster to check since they often lead to a constant evaluation time.

There ...