Explanatory comment #1130

Job	Run time
downstream	11m 47s
clang-sanitizers (,thread)	11m 54s
clang-sanitizers (,address,undefined)	11m 40s
linux-compat (manylinux1-x64)	10m 55s
linux-shared-libs	11m 17s
linux-compat (manylinux1-x86)	10m 51s
linux-compiler-compat (clang-3)	11m 23s
macos	10m 6s
linux-compat (manylinux2014-x64)	10m 41s
linux-compiler-compat (clang-6)	11m 41s
macos-x64	10m 44s
linux-compat (manylinux2014-x86)	10m 37s
linux-compiler-compat (clang-8)	12m 35s
linux-compat (al2-x64)	10m 35s
linux-compiler-compat (clang-9)	12m 16s
linux-compat (fedora-34-x64)	10m 36s
windows	12m 28s
windows-app-verifier	14m 15s
linux-compiler-compat (clang-10)	11m 44s
linux-compat (opensuse-leap)	11m 38s
linux-compiler-compat (clang-11)	11m 50s
linux-compat (rhel8-x64)	10m 54s
linux-compiler-compat (gcc-4.8)	10m 38s
windows-shared-libs	12m 37s
windows-vc14 (x86)	11m 24s
linux-compiler-compat (gcc-5)	11m 10s
windows-vc14 (x64)	14m 19s
linux-compiler-compat (gcc-6)	11m 15s
linux-compiler-compat (gcc-7)	11m 10s
linux-compiler-compat (gcc-8)	11m 48s
	5h 46m 48s

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