blocks|key|805631|text|每个人都很难将异步与并行或并发联系起来，因为异步并不是并行或并发的反义词。它是同步的反义词。它只是指示某些东西，在这种情况下是线程，是否会与其他东西同步，在这种情况下是另一个线程。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|805632|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Everyone is having trouble associating asynchronous to either parallelism or concurrency because asynchronous is not an antonym to either parallel or concurrent. It is an antonym of Synchronous. Which just indicates if something, in this case threads, will be synched with something else, in this case another thread.

blocks|key|1020300|text|并发VS并行:并发在一个时间点上只能完成一项任务。示例:单cpu处理器并行性在某一点上我们可以完成多个任务。示例:双核或多核处理器|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1020301|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

CONCURRENCY VS PARALLELISM:
concurrency at one point of time only one task can be done. example: single cpu processor
parallelism at one point we can do multiple tasks. example: dual core or multi core processor

blocks|key|1020338|text|“同步和异步是编程模型。并发和并行是执行任务的方式...”。来源：https://medium.com/better-programming/sync-vs-async-vs-concurrent-vs-parallel-5754cdb60f66|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1020339|换句话说，sync和async描述程序在调用函数时如何执行(它将等待还是继续执行？)，而并发和并行描述函数(任务)将如何执行(并发=可能同时执行，并行=同时有效执行)。|1020340|entityMap|0|LINK|mutability|MUTABLE|url|https://medium.com/better-programming/sync-vs-async-vs-concurrent-vs-parallel-5754cdb60f66^0|X|2I|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

"Sync and async are programming models. Concurrent and parallel are ways tasks are executed...".
Source: <a href="https://medium.com/better-programming/sync-vs-async-vs-concurrent-vs-parallel-5754cdb60f66" rel="noreferrer">https://medium.com/better-programming/sync-vs-async-vs-concurrent-vs-parallel-5754cdb60f66</a>

In other words, sync and async describe how your program executes when making a function call (will it wait or will it continue executing?), whilst concurrent and parallel describe how a function (a task) will be executed (concurrent = possibly executed at the same time, parallel = effectively executed at the same time).

blocks|key|805782|text|用类比来解释这些术语。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|805783|你的房子需要洗碗和洗衣服。|805784|并发性:您不必等到一个完成后再开始另一个。例如，你可以先开始上菜，也可以同时上菜。它们可以按任何顺序结束，也就是说，即使你先开始洗碗，也可能先洗好衣服。|805785|并行性:房子里不止一个人在做这项工作；举个例子，你可以洗碗，另一个人可以洗衣服。|805786|异步:你让别人洗衣服，然后让别人洗碗。他们实际上可以是同一个人(例如，你告诉他们洗衣服，然后立即告诉他们洗碗)。他们完成每一个任务后都会向你汇报。|805787|同步:你让某人洗碗。你等着他们。当他们完成后，你可以做其他的事情(你可以告诉他们下一步去洗衣服，或者你可以自己做，或者你可以完全做其他的事情；关键是你在第一个任务完成时受阻，你和他们是同步的)。|805788|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

Explaining these terms with an analogy.
Your house needs the dishes washed and the laundry done.
Concurrency: you do not wait to finish one before starting another. You can start the dishes first for example, or start both at the same time. They can finish in any order, i.e. even if you started the dishes first, maybe the laundry gets done first.
Parallelism: you have more than one person in the house doing the work; as an example, you could work on the dishes, and the other person can do the laundry.
Asynchronous: You tell someone to do the laundry and you tell someone to do the dishes. They can actually be the same person (i.e. you tell them to do the laundry and immediately also tell them to do the dishes). They report back to you when they're done with each.
Synchronous: You tell someone to do the dishes. You wait for them. When they are done, you can do something else (you can tell them to do the laundry next, or you can do it yourself, or you can do something else entirely; point is you are blocked on the completion of the first task, you are in sync with them).

Concurrency is having two tasks run in parallel on separate threads. However, asynchronous methods run in parallel but on the same 1 thread. How is this achieved? Also, what about parallelism?

What are the differences between these 3 concepts?

What is the difference between concurrency, parallelism and asynchronous methods?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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并发是让两个任务在不同的线程上并行运行。然而，异步方法是并行运行的，但在同一个线程上。这是如何实现的？另外，并行性又如何呢？这三个概念之间有什么区别？

问并发、并行和异步方法之间的区别是什么？
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问并发、并行和异步方法之间的区别是什么？EN