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This article introduces the relevant knowledge of "how to understand the concurrency, multithreading and connection number of ip agents". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Concurrency: in an operating system, it refers to several programs that have been completed over a period of time and then run.

When applying proxy IP, it means that there are multiple active TCP connections over a period of time.

2. Multithreading: multithreading refers to the technology of multi-thread concurrent execution from software or hardware.

With the support of hardware, computers with multithreading capability can execute multiple threads at the same time, thus improving the overall processing performance.

3. The number of HTTP connections: the elements loaded in js, css, img and iframe generated when visiting the target page are counted as the number of http connections.

What is the relationship between the three? Some people think that 100 threads, 100 concurrency, 100 connections, this is wrong.

If there is only one valid TCP link per thread, there will naturally be 100 concurrency; if each thread has many active TCP links, it is impossible to have 100 threads at the same time.

With regard to the number of connections, the number of connections is equal to 1 only when visiting static pages that are plain text. At present, this situation basically does not exist, at present, it is basically a dynamic website, there are at least several connections to a website, and the number of connections to different websites is also different. All in all, the three relationships are not simply equal. A specific situation needs to be analyzed in detail. A thread can also be 100 concurrent, and 100 connections can be generated together.

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