The problem compounds in pipelines. Each TransformStream adds another layer of promise machinery between source and sink. The spec doesn't define synchronous fast paths, so even when data is available immediately, the promise machinery still runs.
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I also knew that if I bought a jar of sauce, I’d use it once and the rest would sit in my fridge until it eventually went to waste. That’s when it clicked: why wasn’t there a perfectly portioned pasta and sauce kit that wasn’t precooked? It felt like there was a real need for something that reduced waste while delivering high-quality ingredients in just the right portions.
The rest of my performance wins were more typical - small reductions in CPU cycles by staring at lots of performance traces.