Performance depends on the size of Arr/pack

[leissa]

Here Thorin is doing things 100000000 times.

.import mem;

.let i32 = .Idx 4294967296;
.let size = 100000000:.Nat;

.cn .extern main [mem: %mem.M, argc: i32, argv : %mem.Ptr («⊤:.Nat; %mem.Ptr («⊤:.Nat; .Idx 256», 0:.Nat)», 0:.Nat), return : .Cn [%mem.M, i32]] = {
    .let (alloc_mem, arr) = %mem.alloc (<<size; i32>>, 0) (mem);
    .let lea = %mem.lea (size, <size; i32>, 0) (arr, 0:(.Idx 100));
    .let (load_mem, val) = %mem.load (i32, 0) (alloc_mem, lea);

    return ( load_mem, 1:i32 )
};