Concatenate records without duplicates (#628) #1652

Job	Run time
check	1m 1s
check	1m 23s
test ${{ matrix.target.triple }} (${{ matrix.target.toolchain }})	0s
cross ${{ matrix.target.triple }} (${{ matrix.target.toolchain }})	0s
fuzz ${{ matrix.item.name }}	0s
fmt	0s
fmt	22s
clippy	0s
clippy	1m 6s
audit	0s
audit	2m 28s
udeps	0s
udeps	9m 41s
upgrades	0s
upgrades	3m 50s
book	0s
book	3m 6s
gh-pages	0s
gh-pages	4m 3s
fuzz record_ref	6m 32s
fuzz select_query	8m 22s
fuzz byte_record	10m 36s
fuzz fuzz_path	10m 9s
cross x86_64-unknown-linux-gnu (stable)	1m 38s
cross x86_64-unknown-linux-gnu (beta)	2m 17s
cross x86_64-unknown-linux-gnu (nightly)	1m 48s
cross x86_64-unknown-linux-musl (stable)	1m 39s
cross aarch64-unknown-linux-gnu (stable)	1m 34s
cross aarch64-unknown-linux-musl (stable)	2m 1s
test x86_64-unknown-linux-gnu (stable)	1m 55s
test x86_64-unknown-linux-gnu (beta)	2m 22s
test x86_64-unknown-linux-gnu (nightly)	2m 19s
test x86_64-apple-darwin (stable)	2m 39s
test x86_64-apple-darwin (beta)	5m 25s
test x86_64-apple-darwin (nightly)	3m 9s
test x86_64-pc-windows-gnu (stable)	3m 32s
test i686-pc-windows-msvc (stable)	7m 42s
	1h 42m 39s

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