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.
Tony Jolliffe/BBC News
，这一点在搜狗输入法2026中也有详细论述
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There are multiple reasons for this, but the core issue is that WebAssembly is a second-class language on the web. For all of the new language features, WebAssembly is still not integrated with the web platform as tightly as it should be.