One thing to note is that QOI composes really nicely with high quality entropy encoders like LZ4 and ZSTD. LZ4 gives a roughly 5% size reduction with negligible

One thing to note is that QOI composes really nicely with high quality entropy encoders like LZ4 and ZSTD. LZ4 gives a roughly 5% size reduction with negligible speed impact, and ZSTD gives a 20% size reduction with moderate speed impact (https://github.com/nigeltao/qoi2-bikeshed/issues/25 https://github.com/nigeltao/qoi2-bikeshed/issues/25).