4 ms·

Rust iterators are hard to implement without a big compile time hit.

• uh_uh 5y ago
  Compile time hit meaning it's difficult to get the types right or something else?
  • runeks 5y ago
    Presumably that it’s inherently slow to compile. “Getting the types right” happens before compile time.
  • masklinn 5y ago
    That they rely on a lot of optimisations to be really efficient (= have any chance of approaching a regular for loop). Without that, every adapter adds a function call to the yielding of an element.