k256

k256+primeorder: use `batch_normalize_generic` for trait impl (#976) #2041

Job	Run time
benches (1.65.0)	4m 59s
benches (stable)	2m 58s
build (1.65.0, thumbv7em-none-eabi)	4m 13s
cross (armv7-unknown-linux-gnueabihf, 1.65.0)	7m 35s
build (1.65.0, wasm32-unknown-unknown)	6m 13s
cross (armv7-unknown-linux-gnueabihf, stable)	1m 25s
build (stable, thumbv7em-none-eabi)	54s
doc	23s
build (stable, wasm32-unknown-unknown)	38s
cross (aarch64-unknown-linux-gnu, 1.65.0)	4m 56s
cross (aarch64-unknown-linux-gnu, stable)	1m 25s
cross (powerpc-unknown-linux-gnu, 1.65.0)	4m 47s
test (i686-unknown-linux-gnu, 1.65.0, sudo apt update && sudo apt install gcc-multilib)	5m 28s
cross (powerpc-unknown-linux-gnu, stable)	2m 7s
test (i686-unknown-linux-gnu, stable, sudo apt update && sudo apt install gcc-multilib)	1m 53s
test (x86_64-unknown-linux-gnu, 1.65.0)	7m 49s
test (x86_64-unknown-linux-gnu, stable)	2m 36s
	1h 0m 19s

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