This repo aims to measure performance between Godot-Rust, GDExtension and GDScript.
GDExtension is able to do about 4x calls to a function than GDScript and Godot Rust. Godot Rust performs about as good as GDScript, a bit better.
For the test, I am doing a function call inside a _process() call and measuring fps.
for GDExtension with 1000000 (1 million) calls to a Noop function, I get 40 fps. for Godot Rust with 1 million unbinded calls I get 15 fps for Godot Rust with 1 million binded calls I get 11 fps for GDScript with 1 million noop calls I get 9 fps
Right now there are scripts to build in scripts folder (for macOS). After building you can open godot folder and open the project there and run test scene. Comment/uncomment these lines:
#summator_node.add(1)
#test_node.noop()
#PerformanceTestNodeRust.noop()
noop()