Changes

Parallel query execution is recommendable if you have various calls that require a lot of time, but cannot be sped up by rewriting the code. This is e. g. the case if external URLs are called. If you are parallelizing local data reads (such as accessing the access to a database), your single-threaded query queries will usually be faster, because parallelized access to disk data will often lead to results in randomized access patterns, which can hardly be optimized by your the caching strategies of HD , SSD or SSDoperating system.