Thread: A peculiar performance problem: Application get's faster after adding more logging.

Me and my colleagues are thinking about how to solve a rather unique situation /at least in my experience/.

Our customers have been complaining about how fast [ how slow, to be more precise ] our application processes files [each about 1kB usually ] ... so we've spent some time inspecting the code of the would-be-thread and added a few lines for log4j to measure time between every operation to find out on which parts to focus. Up to this point it's all normal. The strange part comes that EVERY part to which we logged the starting and ending point got a LOT faster [ try 20 times faster ] normally it would take 4-10 seconds, depending on what else was running on the machine, but after adding the logs it suddenly dropped to 0.3-1.6 seconds per file.

Does anyone have a notion as to what we're looking for? We can't seem to find anything.

Well... in a way, but this thread is the only thread with this set of instructions. There is nothing that can interfere...

Yep, I did post it to the StackOverflow, after posting here. I though that more opinions would help the search. But for now the search is halted until tomorrow evening, we have to make sure that the newest version works as it's supposed to, therefore the whole team is checking whether the last fixes work as they should...

As for being forthright, I tried to, but to be honest, there's plenty of what I wasn't sure I could post on-line. As for the code, I'm not allowed to post it. As said, there's parts of my contract, which would get me a hefty fine and into a lot of legal trouble.

One of the problems is I never wrote the code [ I mean, I wrote SOME code, but not the problematic code in question ] , I joined the team just a year ago and I'm still "a girl for everything" , So I have to be careful.

You should pastebin.com the code so we can see it. You can leave out vital parts that you don't feel affect the program.