Tests

perf: replace std partition_point #649

Job	Run time
cross (powerpc64-unknown-linux-gnu)	2m 34s
cross (aarch64-unknown-linux-gnu)	2m 29s
cross (i686-unknown-linux-gnu)	2m 36s
test (stable, windows-latest)	4m 53s
cross (aarch64-unknown-linux-musl)	2m 47s
cross (riscv64gc-unknown-linux-gnu)	2m 27s
test (stable, ubuntu-latest)	1m 59s
test (1.75.0, macos-latest)	1m 43s
test (stable, macos-latest)	1m 33s
test (1.75.0, windows-latest)	4m 43s
test (1.75.0, ubuntu-latest)	2m 11s
	29m 55s

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