[libcxx-commits] [libcxx] [libc++] added benchmarks for `string::append()` (PR #213990)

[Nikolas Klauser via libcxx-commits]

================
@@ -43,6 +43,25 @@ void bench(std::string name, Func func, Mod modifier = {}) {
 #endif
 }
 
+template <typename Iterator>
+struct unoptimizable_forward_iterator : Iterator {
----------------
philnik777 wrote:

Do we really want to derive from the iterator? We don't usually do that because it's fragile. e.g. this doesn't work for raw pointers.

https://github.com/llvm/llvm-project/pull/213990