Specializations can wait a bit

rust-itertools · Sep 29, 2023 · eab77e7 · eab77e7
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@@ -33,6 +33,8 @@ This mostly applies to your new module, each import from it, and to your new `It
 It might be more performant to specialize some methods.
 However, each specialization should be thoroughly tested.
 
+Correctly specializing methods can be difficult, and _we do not require that you do it on your initial PR_.
+
 Most of the time, we want specializations of:
 
 - [`size_hint`](https://doc.rust-lang.org/std/iter/trait.Iterator.html#method.size_hint):