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.
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Prices haven't yet been released for this year's event, which will also feature artists including Primal Scream, Biffy Clyro and former Irish Eurovision entry Bambie Thug.
Before diving into API design, it's worth asking: what is a stream?