Internal Program Version: libqt5-qtbase  5.15.16

The QtConcurrent namespace provides high-level APIs that help write
multi-threaded programs without using low-level threading primitives
such as mutexes, read-write locks, wait conditions, or semaphores.
Programs written with QtConcurrent automatically adjust the number of
threads used according to the number of processor cores available.

QtConcurrent includes functional programming style APIs for parallel
list processing, including a MapReduce and FilterReduce
implementation for shared-memory (non-distributed) systems, and
classes for managing asynchronous computations in GUI applications.

https://www.qt.io