absl::PrefetchToLocalCacheNta

void
PrefetchToLocalCacheNta(void const* addr);

Description

This function is identical to PrefetchToLocalCache() except that it has non-temporal locality: the fetched data should not be left in any of the cache tiers. This is useful for cases where the data is used only once / short term, for example, invoking a destructor on an object.

Incorrect or gratuitous use of this function can degrade performance. Use this function only when representative benchmarks show an improvement.

Example:

template <typename Iterator> void DestroyPointers(Iterator begin, Iterator end) { size_t distance = std::min(8U, bars.size());

int dist = 8; auto prefetch_it = begin; while (prefetch_it != end && --dist;) { absl::PrefetchToLocalCacheNta(*prefetch_it++); } while (prefetch_it != end) { delete *begin++; absl::PrefetchToLocalCacheNta(*prefetch_it++); } while (begin != end) { delete *begin++; } }