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This article mainly explains "what can swoole do". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what swoole can do.

The benefits of swoole: 1, multiple Web workers and separate task workers, which can delay the code; 2, cooperation program support; 3, no need to install other Web servers; 4, you can increase the request limit.

Operating environment of this tutorial: Windows10 system, Swoole4 version, DELL G3 computer

What is Swoole?

Swoole is an asynchronous PHP programming framework based on co-programming.

It is mainly developed by Chinese developers engaged in large-scale applications for the Chinese market. Therefore, it has been stress tested and verified in a high-flow production environment. This is a technology you can absolutely rely on, and it's exciting to work with it!

Benefits of Swoole

Swoole has many benefits including multiple Web staff and individual mission staff collaborative support and the ability to significantly increase the request ceiling.

Support for multiple Web Worker

Support for separate task workpieces

Collaborative process support

No Web server required

The request limit can be increased.

Multiple Web workers and separate task workers

As mentioned above, Swoole has multiple Web workers and separate task workers, which can delay the code. Long-running processes open the door to many previously unimplemented methods in your API and applications, such as deferring processing until after the response is sent.

Collaborative process support

Swoole's Coroutine support means that even if you are performing a large number of expensive I / Os (for example, talking to a database, using the file system, and making HTTP requests), you can handle many requests.

The bootstrap only loads once, so you don't have to pay a 15% to 25% tax on each request. Because this is part of initialization, it means that you use fewer resources on each request, including RAM and CPU. For some applications, this may mean that you need fewer servers, which may already be due to the asynchronous runtime.

No other Web servers are required

Speaking of fewer servers, you don't need a Web server because Swoole is a Web server. You can start a Docker container that only installs PHP without having to install NGINX in front of it.

You don't have to write NGINX or Apache in the same container, it can just be PHP. Moreover, if you want to do any kind of containerization, it is indeed the gold standard to use all of these single-process containers in one language.

The upper limit of higher requirements

Interestingly, members of the Zend Framework and Laminas communities believe that asynchronous servers can handle four to seven times as many requests as standard settings.

Of course, you can adjust Apache and NGINX very quickly, but you can get faster with asynchronous servers, and Node has proved this again and again.

Shortcoming

Although the privileges listed above can bring considerable benefits to PHP applications, Swoole still has some obvious disadvantages.

These shortcomings may include:

Code reinstallation

Debug

One listener for each event

The "end ()" method of Swoole Response

Non-standard request / response API

Code reinstallation

As PHP developers, we are used to making changes to the code and then reloading the browser to see the impact of the changes.

Unfortunately, the ability to reload code is missing in Swoole. That's because it's a long-running process. Therefore, when refreshing, it uses the same code as before the change.

There are some hot code reloading capabilities in Swoole, but it is not possible to reload anything needed to boot the actual server instance (thought application instance, DI container, configuration) itself.

Debug

Debugging can be a challenge because Swoole's collaboration support is not compatible with Xdebug and Xhprof. You will need to get used to logging.

Respond to the end method

In Swoole, if you forget to call "$response- > end ()", the connection will remain open until a network timeout occurs. This means that the current process remains open, which means that the event loop no longer exists. Eventually, this will result in a timeout, and you will get a timeout, but the timeout is still a problem.

Therefore, if you can abstract from it, you can avoid headaches. This functionality is necessary so that Swoole knows when the response is completed and can release the staff to process another request; however, from the user's point of view, this is a problem because it is easy to forget to call it. )

Therefore, this is a very useful and convenient feature in the Swoole runtime, but it is even better if you can avoid doing so in your own code.

Non-standard request / response API

The "$response- > end ()" method is an example of a non-standard request / response API in Swoole. It does not follow the PSR-7 specification (PHP's HTTP message interface) or even any framework implementation, such as Symfony's HTTPKernel or laminas-http.

Therefore, if you want to write Swoole directly, but still want to use your own framework, you need to make adjustments-but this can be a problem.

Thank you for your reading, the above is the content of "what can swoole do". After the study of this article, I believe you have a deeper understanding of what swoole can do, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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