项目反应堆中的Flatmap，Flatmap序列和辅助图有什么区别？
我从文档中读到flatmap：
将这种通量异步发出的元素转化为发布者，然后通过合并将这些内部发行商弄平为单个通量，从而使它们交织在一起。
FlatMapSequention：
将这种通量异步发出的元素转换为发布者，然后将这些内部发行商弄平为单个通量，但按照其源元素的顺序合并。
concatmap：
将这种通量异步发出的元素转化为发布者，然后将这些内部发行商弄平为单个磁通，并使用串联依次保存顺序。 该操作员有三个维度可以与flatmap和flatmap序列进行比较：
生成内部和订阅：该操作员在生成下一个并订阅下来之前等待一个内部完成。
扁平值的排序：该操作员自然保持与源元素相同的顺序，从而依次从每个源元素中加入Inners。
交错：该操作员不允许不同内部的价值交织（串联）。
flatmap与其他两个之间的差异是可以理解的，但是我不明白concatmap和flatmapsequepential之间的差异。两者之间有任何性能差异吗？我已经读到FlatMapSequention有一个队列的缓冲区大小，但是我不明白为什么ConcatMap不需要一个。
I've read from the documentation that flatMap:
Transform the elements emitted by this Flux asynchronously into Publishers, then flatten these inner publishers into a single Flux through merging, which allow them to interleave.
that flatMapSequential:
Transform the elements emitted by this Flux asynchronously into Publishers, then flatten these inner publishers into a single Flux, but merge them in the order of their source element.
and that concatMap:
Transform the elements emitted by this Flux asynchronously into Publishers, then flatten these inner publishers into a single Flux, sequentially and preserving order using concatenation.
There are three dimensions to this operator that can be compared with flatMap and flatMapSequential:
Generation of inners and subscription: this operator waits for one inner to complete before generating the next one and subscribing to it.
Ordering of the flattened values: this operator naturally preserves the same order as the source elements, concatenating the inners from each source element sequentially.
Interleaving: this operator does not let values from different inners interleave (concatenation).
The difference between flatMap and the other two is pretty understandable, but I don't understand when the difference between concatMap and flatMapSequential takes place. Is there any performance difference between the two? I've read that flatMapSequential has a buffer size for some queue, but I don't understand why concatMap doesn't need one.
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' flatmap 和
flatmapsequepential＆nbsp;运营商急切地订阅concatmap＆nbsp;等待每个内部完成对此。让我们看看一个示例：
输出：
如您所见，
flatmap不能保留原始订购，并且急切地订阅了所有三个元素。另外，请注意，元素3已在元素2之前进行。这是使用
FlatmapSequention的输出：Flatmapsequential已急切地订阅了所有三个元素，例如flatsmap但保留了按订单收到的排队元素的订单。这是使用
ConcatMap的输出：ConcatMap＆nbsp;自然地保留与源元素相同的顺序。The
flatMapandflatMapSequentialoperators subscribe eagerly, theconcatMapwaits for each inner completion before generating the next sub-stream and subscribing to it.Let's see an example:
Output:
As you can see,
flatMapdoes not preserve original ordering, and has subscribed to all three elements eagerly. Also, notice that element 3 has proceeded before element 2.Here is the output using
flatMapSequential:flatMapSequentialhas subscribed to all three elements eagerly likeflatMapbut preserves the order by queuing elements received out of order.Here is the output using
concatMap:concatMapnaturally preserves the same order as the source elements.