gVisor and user-space kernelsgVisor is where the isolation model changes qualitatively. To understand the difference, it helps to look at the attack surface of a standard container.
"result": {
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Wage bill increased by £42m to £428m, accounts show
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.