Loop Interchange: Improve Cache Efficiency and Speed Up Execution
emmtrix Tech Posts
Category: Loop Transformations
In our last post, we introduced Loop Unrolling to reduce loop overhead. Now, let’s look at Loop Interchange, a transformation that swaps the order of nested loops.
Why use Loop Interchange?
- Improves cache efficiency and reduces cache misses by ensuring sequential, cache-friendly memory access
- Enables compiler optimizations such as vectorization and parallelization
Example:
If a loop accesses a 2D array in an inefficient order (e.g., column-first in a row-major layout), Loop Interchange swaps the loop order to ensure contiguous memory access, improving performance.
Stay tuned for more Loop Transformations and General Code Transformations to optimize your code!
Already posted articles:
👉 Learn more on Loop Interchange and explore examples in our wiki.
