adonis0147 commented on PR #10386:
URL: https://github.com/apache/doris/pull/10386#issuecomment-1165336946
> > Hi @mrhhsg , the underlying implementation of `std::iota` is also a
loop. Why does this modification take effect?
> > ```c++
> > template <class _ForwardIterator, class _Tp>
> > inline _LIBCPP_INLINE_VISIBILITY
> > void
> > iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value_)
> > {
> > for (; __first != __last; ++__first, (void) ++__value_)
> > *__first = __value_;
> > }
> > ```
>
> Maybe the original for-loop cannot be vectorized.
I think it is better to provide some evidences to prove it.
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