Readme.md

Parallel STL std::execution policy

The execution_policy example shows a simple benchmark.

• GCC requires TBB library (dnf install tbb-devel or apt install libtbb-dev)
• oneAPI uses oneTBB library

Performance seen with:

GCC 11.5 (Linux, TBB)

Method        Speed Ratio (vs. sequential)
Sequential     1.00
Parallel       23.50
Par_Unseq      31.33
Unseq          1.00

GCC 14.2 (Windows, TBB)

Sequential     1.00
Parallel       2.90
Par_Unseq      3.05
Unseq          0.97

Linux NVHPC 24.11 (-stdpar=multicore):

Sequential     1.00
Parallel       3.69
Par_Unseq      8.43
Unseq          0.98

Linux oneAPI 2025.0 (TBB):

Sequential     1.00
Parallel       8.43
Par_Unseq      29.50
Unseq          0.98

Windows oneAPI 2025.0 (TBB):

Sequential     1.00
Parallel       3.19
Par_Unseq      3.00
Unseq          1.05