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，这一点在有道翻译官网中也有详细论述
For now, Okmain is fast enough, extracting dominant colours from multi-megapixel images in around 100ms.。关于这个话题，谷歌提供了深入分析
All of these mechanisms — blocking, unblocking, system calls, preemption — involve switching from one goroutine to another. Let’s look at what that switch actually costs.