That's strange, in my experience it shouldn't have 6x slowdown. Probably might be due to several factors, but here's your test, running on my system without Doc

That's strange, in my experience it shouldn't have 6x slowdown. Probably might be due to several factors, but here's your test, running on my system without Docker: Ryzen 3900X (host machine) $ dd if=/dev/urandom bs=4k count=10k | gzip >/dev/null 10240+0 records in 10240+0 records out 41943040 bytes (42 MB, 40 MiB) copied, 1.02284 s, 41.0 MB/s qemu-aarch64-static $ dd if=/dev/urandom bs=4k count=10k | proot -R /tmp/aarch64-alpine -q qemu-aarch64-static sh -c 'gzip >/dev/null' 10240+0 records in 10240+0 records out 41943040 bytes (42 MB, 40 MiB) copied, 3.33964 s, 12.6 MB/s