What is the difference between nodejs and swoole

The difference between nodejs and swoole: 1. Swoole provides coroutines, while nodejs does not provide coroutines; 2. By default, Swoole generates multiple worker threads on each server, while nodejs can generate multiple worker threads on each server. Multiple workers are supported but require additional dependencies.

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

What is the difference between nodejs and swoole

What is Swoole?

Swoole is an asynchronous PHP programming framework based on coroutines.

It is mainly developed by Chinese developers working on large-scale applications targeting the Chinese market. As such, it has been stress-tested and validated in high-traffic production environments. This is technology you can absolutely rely on and it's exciting to work with!

Benefits of Swoole

Swoole has many benefits, including multiple web workers and separate task workers, coroutine support, and the ability to significantly increase request caps.

Benefits of Swoole:

• Support multiple Web Workers

• Support separate task workers

• Coroutine support

• No need for web server

• Can increase the request limit

• Multiple Web Workers and Separate Task Workers

# As mentioned above, Swoole has multiple web workers and separate task workers, allowing code to be deferred. Delaying long-running processes opens the door to many previously unachievable methods in your APIs and applications, such as deferring processing until after a response has been sent.

Coroutine Support

Swoole's Coroutine support means that even if you are doing a lot of expensive I/O (e.g. talking to a database, using the file system, issuing HTTP requests), you can also handle many requests.

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

No additional web server 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 and doesn't need NGINX installed in front of it.

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

Higher Requirement Ceiling

Interestingly, members of the Zend Framework and Laminas communities believe that the async server is capable of handling four requests that the standard setup can achieve. to seven times.

Of course, you can tune Apache and NGINX to be very fast, but you can get even faster speeds with an asynchronous server, and Node has proven this time and time again.

Disadvantages

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

These disadvantages may include:

• Code reinstallation

• Debugging

• One listener per event

• Swoole Response's "end()" method

• Non-standard request/response API

Code Reload

As PHP developers, we are used to making changes to our 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. So when it refreshes, it's using the same code as before the change.

There is some hot code reloading functionality in Swoole, but right now there is no way to reload anything required to boot the actual server instance (think application instance, DI container, config) itself.

Debugging

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

Response "end" method

In Swoole, if you forget to call "$response->end()", the connection will remain open until A network timeout occurred. This means that the current process remains open, which means the event loop no longer exists. Eventually this will cause a timeout, and a timeout will be obtained, but the timeout is still an issue.

So if you can abstract away from that, you can avoid the headache. (This function is required so that Swoole knows when the response is complete and can free up the worker to handle another request; however, from the user's perspective, this is a problem since it is easy to forget to call it.)

So, this is a very useful and convenient feature in the Swoole runtime, but it would be better if you could avoid doing it 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 messaging interface) or even any framework implementation such as Symfony's HTTPKernel or laminas-http.

So if you're writing Swoole directly but still want to use your own framework, you'll need to adapt - but this can be a problem.

Swoole vs. NodeJS

Swoole provides very similar functionality to NodeJS. It has an event loop, provides asynchronous HTTP, network and socket clients, can create web servers, the list goes on and on. But what's the difference?

Coroutine

Perhaps the biggest difference between Swoole and NodeJS is that Swoole provides coroutines. Additionally, it provides coroutine support for built-in clients such as TCP and UDP. Coroutines allow asynchronous processing of the language's internals while allowing code to be written as if the execution were synchronous. Typical asynchronous coding requires passing a callback that will be executed when the asynchronous process completes, which may lead to convolutional code to aggregate the results. Coroutines greatly simplify working with asynchronous code by making it look the same as normal synchronous code.

Since Swoole coroutine support includes most TCP/UDP operations, if you are making a network call (for example, making an HTTP call to another server), or are using TCP operations to communicate with Redis, then Can benefit from coroutine support.

Multi-threading

The difference between Swoole and Node is that by default, Swoole spawns multiple worker threads on each server and spawns multiple worker threads with the server. The number of worker threads is proportional to the number of cores present. Therefore, by default, it runs at optimal performance.

Having multiple workers also means that if one worker is blocked in a long process, there may be another worker available to handle it. Each of these has a corresponding event loop, which means that each event can be deferred or spawned as a coroutine, greatly improving application performance.

Task Workers

In addition to having multiple workers on each server, Swoole can also generate Task Workers independent of web workers.

If you want to postpone some operation without blocking the web request on it, and know that you don't have to wait for its result, you can instead spawn a task that will go into the task worker pool for you to process so. This means truly non-blocking operations on your web worker pool!

Recommended learning: swoole tutorial

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