Seccomp-BPF as a filterSeccomp-BPF lets you attach a Berkeley Packet Filter program that decides which syscalls a process is allowed to make. You can deny dangerous syscalls like process tracing, filesystem manipulation, kernel extension loading, and performance monitoring.
Real image compression (JPEG, PNG) uses different techniques (DCT, entropy coding), but quadtrees capture the same principle: spend your bits where the detail is, not uniformly across the whole image.
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