Is there a way I can measure how much stack memory a function uses?
This question isn't specific to recursive functions; however I was interested to know how much stack memory a function called recursively would take.
I was interested to optimize the function for stack memory usage; however, without knowing what optimizations the compiler is already making, it's just guess-work if this is making real improvements or not.
To be clear, this is not a question about how to optimize for better stack usage.
So is there some reliable way to find out how much stack memory a function uses in Rust?
Note that other compilers support this, GCC has -fstack-usage for example.
As of today there are some experimental tools to estimate stack usage: https://crates.io/crates/cargo-call-stack
It uses experimental -Z emit-stack-sizes to get the stack for each function, and then manage to extract the call graph and from there generate the worst case estimation