react的render函数会check目标是否存在？

但是假如你收到数据之后要做比较heavy的反序列化呢？虽然这种情形比较特殊，但是还是显示地cancel会比较省CPU。对于移动端来说还是有意义的。
【 在 XeCycle 的大作中提到: 】
: well, sometimes we do not even need to cancel; we just have to discard
: previous results.  if we had an IO monad that is very restricted like it
: is in haskell, such problems may simply disappear.
: ...................
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