• Statmemprof: a new statistical memory profiler
• A new instrumented runtime that records runtime statistics in a standard format
• A native backend for the RISC-V architecture
• Improved backtraces that refer to function names
• Suppport for recursive and yet unboxed types
• A quoted extension syntax for ppxs.
• Many quality of life improvements
• Many bug fixes.

See also the detailed list of changes