[libcxx-commits] [libcxx] [libcxx] Added segment iterator for fill (PR #104680)

[via libcxx-commits]

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@@ -21,23 +21,64 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 // fill isn't specialized for std::memset, because the compiler already optimizes the loop to a call to std::memset.
 
-template <class _ForwardIterator, class _Tp>
+template <
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NoumanAmir657 wrote:

Benchmark                       Old             New

bm_deque_fill/1                 2.33            3.75 ns
bm_deque_fill/2                 2.82            4.01 ns
bm_deque_fill/3                 3.26            4.01 ns
bm_deque_fill/4                 3.60            3.34 ns
bm_deque_fill/5                 3.92            3.64 ns
bm_deque_fill/6                 4.48            3.64 ns
bm_deque_fill/7                 4.83            3.79 ns
bm_deque_fill/8                 5.46            3.28 ns
bm_deque_fill/16               9.44            3.25 ns
bm_deque_fill/64               33.3            3.14 ns
bm_deque_fill/512             200             7.20 ns
bm_deque_fill/4096           2041           39.7 ns
bm_deque_fill/32768         16345         288 ns
bm_deque_fill/262144       130562       2340 ns
bm_deque_fill/1048576     522694      12346 ns

https://github.com/llvm/llvm-project/pull/104680