RFC for the task arena waiting functionality #3653

Job	Run time
examples_clang-format	7s
codespell	15s
copyright_check	5s
examples_ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	3m 44s
examples_ubuntu-20.04_g++_cxx17_release_preview=ON	3m 54s
examples_ubuntu-20.04_g++-10_cxx20_debug_preview=ON	4m 38s
ubuntu-latest_g++_cxx14_relwithdebinfo_preview=OFF	20m 54s
examples_macos-15_clang++_cxx14_relwithdebinfo_preview=ON	3m 8s
ubuntu-20.04_g++_cxx17_release_preview=ON	17m 38s
macos-14_clang++_cxx14_relwithdebinfo_preview=ON	8m 33s
macos-13_clang++_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	21m 15s
ubuntu-20.04_g++-10_cxx20_debug_preview=ON	14m 53s
python_module_test_ubuntu_latest	38s
ubuntu-22.04_g++-11_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	17m 29s
windows_cl2019_cxx14_relwithdebinfo_preview=ON	14m 8s
windows_cl2019_cxx20_release_preview=ON-DBUILD_SHARED_LIBS=OFF	20m 26s
examples_windows_cl2019_cxx14_relwithdebinfo_preview=ON	5m 42s
doc_examples_ubuntu-latest_g++_cxx20_relwithdebinfo	39s
windows_cl2022_cxx17_relwithdebinfo_preview=OFF	14m 46s
examples_windows_cl2022_cxx17_relwithdebinfo_preview=OFF	6m 16s
doc_examples_windows-2022_cl_cxx20_relwithdebinfo	1m 44s
documentation	52s
pages	0s
	3h 1m 44s

Provide feedback