Same goes for optimizations, where we assume 80% of the time is spent in 20% of the code. We just finished profiling our 1M LOC C++ codebase and it shows even

Same goes for optimizations, where we assume 80% of the time is spent in 20% of the code. We just finished profiling our 1M LOC C++ codebase and it shows even more extreme numbers; we hit close to 95% of the time spent in 5% of the code.