It's a very useful instruction. Go uses it extensively in its core runtime and the compiler itself. I assume other languages do too if they care about performan

It's a very useful instruction. Go uses it extensively in its core runtime and the compiler itself. I assume other languages do too if they care about performance. Examples: 1. Growing a slice. 2. Runtime's heap bitmap. 3. Page allocation. 4. malloc. 5. Register allocation.