You have to adjust the CPU used parameter, not just quality, for AVIF. Though it can indeed be slow it should not be that slow, especially for a 1mp image. The defaults usually use a higher CPU setting for some reason. I have modest infrastructure that generates 2MP AVIF in a hundred ms or so.

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LtdJorge 3 hours ago | parent [-]

I tested both WebP and AVIF with maximum CPU usage/effort. I have not tried the faster settings because I wanted the highest quality for small size, but for similar quality WebP blew AVIF out of the water.

I also have both compiled with -O3 and -march=znver2 in GCC (same for rav1e's RUSTFLAGS) through my Gentoo profile.

	▲	adzm 3 hours ago \| parent [-]
		Maximum CPU between those two libs is not really comparable though. But quality is subjective and it sounds like webp worked best for you! Just saying though, there is little benefit in using the max CPU settings for avif. That's like comparing max CPU settings on zip vs xz!