What is loop unswitching and how does it improve code performance?

What is loop unswitching and how does it improve code performance?

Loop unswitching is a code optimization technique that involves moving conditional statements outside of loops. This is done to eliminate unnecessary iterations and improve code performance. By unswitching the loop, the compiler can generate more efficient code by reducing the number of times the condition needs to be evaluated within the loop. This optimization technique helps in reducing branch mispredictions and improves cache utilization, resulting in faster execution of the loop.