Performance tuning of interpreter - fixed stacks

[dibyendumajumdar]

Lua allocates stacks dynamically. This means that the VM cannot assume that the base pointer in a function is stable while the function is executing as the base may change due to reallocation. Perhaps by creating pre-allocated stacks of fixed size we can avoid this inefficiency - this will particularly help JIT implementation as we will not have to rely upon LLVM to remove redundant updates to the base pointer.

[dibyendumajumdar]

The main issue with this is that supporting co-routines requires stacks to be dynamic. Because the execution can be resumed on a different stack.