fine-tuned element prefetching in unprotected_bulk_visit

2023-10-18 18:20:22 +02:00
parent 0e19223e5b
commit ea4fc5e66d
1 changed files with 2 additions and 1 deletions
--- a/include/boost/unordered/detail/foa/concurrent_table.hpp
+++ b/include/boost/unordered/detail/foa/concurrent_table.hpp
@ -1216,7 +1216,8 @@ private:
      auto mask=masks[i]=(this->arrays.groups()+pos)->match(hash);
      if(mask){
        BOOST_UNORDERED_PREFETCH(this->arrays.group_accesses()+pos);
-        BOOST_UNORDERED_PREFETCH_ELEMENTS(this->arrays.elements()+pos*N,N);
+        BOOST_UNORDERED_PREFETCH(
+          this->arrays.elements()+pos*N+unchecked_countr_zero(mask));
      }
    }