I learned a very cool technique for profiling my application recently for performance tuning from a post on Stackoverflow. It can be used for most programming languages, does not require any special tools, and is more intuitive to use that many profilers that give you a summary view of some sort. I hunted down the author of that SO post - Mike Dunlavey, and had a nice chat with him. Enjoy! Mike's Stackoverflow post can be found here: https://stackoverflow.com/a/1796715/5304. He also published a paper on it, which can be found here: https://www.cs.tufts.edu/~nr/cs257/archive/mike-dunlavey/performance.pdf.
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