rustdoc: trait.Iterator.html way to huge?

[MarcelBlanck]

https://doc.rust-lang.org/std/iter/trait.Iterator.html lags badly when opened in the Chrome browser. After a minute or two it is fully loaded and ok. In Firefox it is fully working after a few seconds.

But even if it works in Firefox, I have the impression that the page contains accidentally, excessively duplicated entries under Implementors? e.g. when I search for "collect" I find a lot under Implementors (200+): Some function signatures are different, but many many times they have the same signature, same version and same source code link. I do not see the usefulness of all that data.

[hellow554]

Dup of #55900 and #57754