You'll find the detail in https://github.com/microsoft/openjdk-proposals/blob/master/stack_allocation/Stack_Allocation_JEP.md https://github.com/microsoft/openj

You'll find the detail in https://github.com/microsoft/openjdk-proposals/blob/master/stack_allocation/Stack_Allocation_JEP.md https://github.com/microsoft/openjdk-proposals/blob/master/s... This is about stack allocation of objects where safe (i.e. when you can prove they don't escape the local scope) for Hotspot, something that already exists in J9 (IBM's JVM) I think. There is equivalent work for .net core here: https://github.com/dotnet/runtime/blob/master/docs/design/coreclr/jit/object-stack-allocation.md https://github.com/dotnet/runtime/blob/master/docs/design/co... (So the title is somewhat accurate, but you have to do some digging)