JIT

swap order of tags and refcounts #144

Job	Run time
i686-pc-windows-msvc/msvc (Debug)	5m 3s
i686-pc-windows-msvc/msvc (Release)	5m 48s
x86_64-pc-windows-msvc/msvc (Debug)	6m 6s
x86_64-pc-windows-msvc/msvc (Release)	6m 11s
aarch64-pc-windows-msvc/msvc (Debug)	5m 37s
aarch64-pc-windows-msvc/msvc (Release)	6m 16s
x86_64-apple-darwin/clang (Debug)	3m 20s
x86_64-apple-darwin/clang (Release)	1h 0m 51s
aarch64-apple-darwin/clang (Debug)	2m 41s
aarch64-apple-darwin/clang (Release)	22m 27s
x86_64-unknown-linux-gnu/gcc (Debug)	2m 2s
x86_64-unknown-linux-gnu/gcc (Release)	9m 39s
x86_64-unknown-linux-gnu/clang (Debug)	2m 48s
x86_64-unknown-linux-gnu/clang (Release)	6m 12s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 25s
aarch64-unknown-linux-gnu/gcc (Release)	15m 48s
aarch64-unknown-linux-gnu/clang (Debug)	10m 41s
aarch64-unknown-linux-gnu/clang (Release)	8m 41s
	3h 8m 36s

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