Build

jxl-render: Separate extra channel upsampling stage when patches are … #395

Job	Run time
WebAssembly	52s
Compile (ubuntu-latest)	1m 7s
Cross-compile (armv7-unknown-linux-gnueabihf)	1m 29s
Compile (windows-latest)	2m 35s
Cross-compile (aarch64-unknown-linux-gnu)	1m 36s
	7m 39s

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