Ah, Perl. Often derided as a "write-only language", Perl nevertheless enjoys some level of popularity among WTF-savvy workplaces. So when David inherited a codebase through the purchase of a company staffed entirely with, what he had dubbed "mentally challenged chimpanzees", it seemed only natural that the code was entirely in Perl.
Dealing with financial transactions is one of the key features required for any online shopping or banking applications, and as such, it's more or less a solved problem by now. So of course, the perl gurus at ChimpanCorp reinvented the wheel with their Real-time Financial Processing app. It would calculate the user's balance every ten minutes by compiling all data posted since the last calculation, leading to a balance that was never more than ten minutes out of date! Of course, that's as good as you can possibly get when the calculation takes nine minutes to run. Still, the client was wondering if maybe the could speed up the calculations so it could run, say, every five minutes? Or maybe, hypothetically speaking, immediately after every transaction?