Finding these optimization opportunities can itself be a significant undertaking. It requires end-to-end understanding of the spec to identify which behaviors are observable and which can safely be elided. Even then, whether a given optimization is actually spec-compliant is often unclear. Implementers must make judgment calls about which semantics they can relax without breaking compatibility. This puts enormous pressure on runtime teams to become spec experts just to achieve acceptable performance.
This gives fairly heavy images (2.2GB for this base Fedora Silverblue image), but that’s the price to pay for having a complete, ready-to-use system.
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considered by other banks, there were several different ATMs available in the US from