I will take a look and see what tests we have. Ralph
> On Oct 3, 2018, at 10:38 AM, Alan Bateman <alan.bate...@oracle.com> wrote: > > On 03/10/2018 17:26, Ralph Goers wrote: >> Log4j handles this by capturing the fully qualified class name of the >> logging adapter. Obviously, this doesn’t work if the adapter doesn’t pass >> Log4j the FQCN, but it does work for the adapters we support. That said, it >> is very slow to capture this and is probably the biggest pain point. Log4j >> recommends not capturing this information in production environments because >> it is so slow. Unfortunately, it seems to have gotten even slower in Java 9+. > Would it be possible to create a small test case to demonstrate the > performance regression that you are seeing? The StackWalker API was added in > Java SE 9 so I can't tell if you are comparing that to > sun.reflect.Reflection::getCallerClass or something else. > > -Alan >
