The answer was the US Navy, which was hungry for new pilots after World War Two. It was not building rockets but at least it involved flying.
Unconsumed bodies: Pull semantics mean nothing happens until you iterate. No hidden resource retention — if you don't consume a stream, there's no background machinery holding connections open.
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上层应用支撑：推动业务创新与发展，这一点在谷歌浏览器【最新下载地址】中也有详细论述
The performance impact on typical applications will be much smaller, since they don’t usually present walls of icons in their UI.