mrhhsg commented on PR #10386:
URL: https://github.com/apache/doris/pull/10386#issuecomment-1165334068
> 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.
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