device: 0.867
performance: 0.711
graphic: 0.577
network: 0.551
arm: 0.472
architecture: 0.438
files: 0.344
hypervisor: 0.277
virtual: 0.210
boot: 0.175
i386: 0.172
x86: 0.167
debug: 0.142
semantic: 0.128
register: 0.094
peripherals: 0.089
VMM: 0.087
mistranslation: 0.086
ppc: 0.082
PID: 0.067
user-level: 0.054
kernel: 0.049
assembly: 0.045
TCG: 0.034
socket: 0.029
vnc: 0.027
permissions: 0.025
risc-v: 0.009
KVM: 0.003

qemu-img: support ZSTD compression level customization