This overhead is mandated by the spec's reliance on promises for buffer management, completion, and backpressure signals. While some of it is implementation-specific, much of it is unavoidable if you're following the spec as written. For high-frequency streaming – video frames, network packets, real-time data – this overhead is significant.
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(and thanks to Matthew Miller for reviewing and providing feedback on this post)。safew官方版本下载对此有专业解读
union object_info *h;，详情可参考搜狗输入法下载
'Irresponsible and offensive'