Comment Comment by jadbox AFAIK, some Rust types are checked at runtime. For example, RefCell:"Because RefCell<T> allows mutable borrows checked at runtime, you can mutate the value inside the RefCell<T> even when the RefCell<T> is immutable."*source https://doc.rust-lang.org/book/ch15-05-interior-mutability.h...EDIT: Sorry, I don't mean 'runtime type checks' are slowing down Rust, but rather that Rust performs more general runtime safety checks (like RefCell). parent jadbox 7 years ago
"Because RefCell<T> allows mutable borrows checked at runtime, you can mutate the value inside the RefCell<T> even when the RefCell<T> is immutable."
*source https://doc.rust-lang.org/book/ch15-05-interior-mutability.h...
EDIT: Sorry, I don't mean 'runtime type checks' are slowing down Rust, but rather that Rust performs more general runtime safety checks (like RefCell).