Allowing FastExpressions to allocate on Stack?

[CodingMadness]

Pretty much title.

Is this somehow possible, when I can guarantee myself that the Expression wont ever escape the stack-frame it was declared in?

That would be kinda sick, but I fear, it has to do more with how the CLR of .net handles these allocations...

[dadhi]

@Shpendicus

Once upon a time I was trying to do that. It was even somewhere in the branch (now deleted).
But it is hard without inventing your own allocator on stack to represent tree-like nested structures (usually done with references). I could imagine it can be done, especially with the modern .NET and probably with data-oriented data structures, indexes as pointers, etc.

Regarding the short-lived expressions I think it is a good inception for doing that.

Another No for this approach (at least for now) is to have API surface compatibility with the System.Linq.Expressions. I immediately broke this rule when trying it out in the branch.

Currently, I am trying to save allocations just by minimizing them, e.g. packing things, customizing expressions for the variant number of arguments, etc.

But... any ideas are welcome!

[CodingMadness]

Hey sry for the late answer, was not at home after my post anymore.

Once upon a time I was trying to do that. It was even somewhere in the branch (now deleted). But it is hard without inventing your own allocator on stack to represent tree-like nested structures (usually done with references). I could imagine it can be done, especially with the modern .NET and probably with data-oriented data structures, indexes as pointers, etc.

I share same belive!

Regarding the short-lived expressions I think it is a good inception for doing that.
Oh yea :D

Another No for this approach (at least for now) is to have API surface compatibility with the System.Linq.Expressions. I immediately broke this rule when trying it out in the branch.

For your interesst; I do know actually a way, to bring .NET objects from Heap to Stack, it involves some dirty ClR hacking but its not toooooo bad, actually. give me time til weekend cause I have to finish a project and then I will slowly begin my journey on this topic for your Library!

[dadhi]

Converting to discussion.