The feature in OxCaml that more languages should steal
9 hours ago
- #zero-allocation
- #OxCaml
- #compiler-features
- OxCaml allows functions to be annotated with [@zero_alloc], causing the compiler to fail if any allocations occur within their call trees.
- Unlike most languages where allocations are hunted with profilers, OxCaml's approach prevents regressions by enforcing zero allocations at compile time.
- The article demonstrates optimizing a CSV summing program by using [@zero_alloc] to identify and eliminate heap allocations, resulting in a 2.12x speed improvement.
- Other languages like Swift and Clang have similar zero-allocation annotations, but OxCaml's feature is notable for its integration into the compiler.
- Techniques for achieving zero allocations include stack allocation with stack_ or local_ annotations and careful handling of external functions.