GH-143732: SEND specialization #2927

Job	Run time
x86_64-apple-darwin/clang	19m 2s
x86_64-unknown-linux-gnu/gcc	10m 3s
aarch64-unknown-linux-gnu/gcc	7m 48s
aarch64-apple-darwin/clang	10m 38s
x86_64-unknown-linux-gnu/gcc-free-threading	8m 25s
	55m 56s

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