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conda-forge.org "parallel-programming" keyword

parallel-hashmap 1.33 💰
A family of header-only, very fast and memory-friendly hashmap and btree containers.
2 versions - Latest release: almost 5 years ago - 3,043 stars on GitHub
taskflow 3.4.0 💰
A General-purpose Task-parallel Programming System using Modern C++
6 versions - Latest release: almost 4 years ago - 1 dependent repositories - 11,321 stars on GitHub