OCaml 5.2.0 is still a somewhat experimental release compared to the OCaml 4.14 branch. Some of the highlights in OCaml 5.2.0 are:
- Re-introduced GC compaction
- Restored native backend for POWER 64 bits
- Thread sanitizer support
- New Dynarray module
- New -H flag for hidden include directories
- Project-wide occurence metadata support for developer tools
- Raw identifiers
- Local open in type expressions
And a lot of incremental changes:
- Around 20 new functions in the standard library
- Many fixes and improvements in the runtime
- Many bug fixes