Improve performance of sort-merge join (hyrise#2355)

Various small performance improvements in the sort-merge join. No added functionality.
hyrise-mp-22-23 · May 31, 2021 · 6b3fcde · 6b3fcde
1 parent 91dcdfd
commit 6b3fcde
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Showing 5 changed files with 389 additions and 509 deletions.
diff --git a/src/lib/operators/join_hash/join_hash_steps.hpp b/src/lib/operators/join_hash/join_hash_steps.hpp
@@ -287,7 +287,7 @@ RadixContainer<T> materialize_input(const std::shared_ptr<const Table>& in_table
   // Create histograms per chunk
   histograms.resize(chunk_count);
 
-  std::vector<std::shared_ptr<AbstractTask>> jobs;
+  auto jobs = std::vector<std::shared_ptr<AbstractTask>>{};
   jobs.reserve(chunk_count);
   for (auto chunk_id = ChunkID{0}; chunk_id < chunk_count; ++chunk_id) {
     const auto chunk_in = in_table->get_chunk(chunk_id);