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I have a friendly competition with couple of guys in the field of programming and recently we have become so interested in writing efficient code. Our challenge was to try to optimize the code (in sense of cpu time and complexity) at any cost (readability, reusability, etc).
The problem is, now we need to compare our codes and see which approach is better comparing to the others but we don't know any tools for this purpose.
My question is, are there some (any!) tools that takes a piece of code as input and calculates the number of flops or cpu instructions necessary for running it? Is there any tool can measure the optimacy of a code?
P.S. The target language is c++ but would be nice to know if such tools exists also for java.
There are pieces of software called profilers which exactly do what you want.
An example for Windows is AMD code analyser and gprof for POSIX.