Inline functions Ordering::{then, then_with} #40514
Merged
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@jongiddy noticed bad performance due to the lack of inlining on
then
and
then_with
. I confirmed that inlining really is the culprit bycreating a custom
then
function and repeating his benchmark on mymachine with and without the
#[inline]
attribute.The numbers were exactly the same on my machine without the attribute.
With
#[inline]
I got the same performance as I did with manuallyinlined implementation.
The problem was reported in #37053.