除了广告费用以外，很大一部分都是平台服务费用。
This information asymmetry provides Google with significant competitive advantages, allows it to preempt, copy, and undermine competing products and services, and may open many questions about antitrust.
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Implementations have found ways to optimize transform pipelines by collapsing identity transforms, short-circuiting non-observable paths, deferring buffer allocation, or falling back to native code that does not run JavaScript at all. Deno, Bun, and Cloudflare Workers have all successfully implemented "native path" optimizations that can help eliminate much of the overhead, and Vercel's recent fast-webstreams research is working on similar optimizations for Node.js. But the optimizations themselves add significant complexity and still can't fully escape the inherently push-oriented model that TransformStream uses.，详情可参考旺商聊官方下载