How to organize complex calculations on a web server?

Question

PHP

I am making a web server. ubuntu, apache, php7. It is required to carry out large calculations on the server side with asymptotics O(n^2), O(n log n), O(n!). Is it the correct approach to write these calculations in C++?
PHP calls the executable, passes data to it, then gets the return result.
How can this be implemented?
What other approaches are there?

Answer 1

You need queues.
In PHP, put a task in a queue, and in a handler in a more productive language, but still a convenient language (does Java have any alternatives?), Get tasks and execute.

Answer 2

release asynchronously
python, c++, golang, node, java - everything faster than PHP

Answer 3

PHP7 speed is not enough for these calculations? If you are sure that it is not, then the main approaches are:
1. Calling the executable file (as already mentioned).
Normal approach. To start, you can safely start with it. Yes, it seems ugly, but is it a task for you to solve or a purely academic interest? This approach stops working if the binary to run is quite heavy and the service is highly loaded. In general, there is the overhead of starting a new process on the system for every HTTP request.
2. Writing a PHP extension that adds a method or class.
From a technical point of view - one of the best options. But from a practical point of view, one of the worst. In addition to keeping the business logic up-to-date, you will also have to keep the extension syntax up-to-date. Also additional time costs for administration.
3. Microservice (daemon) that will accept requests through the task queue or directly.
To me, it's kind of a compromise. On the one hand, there is no cost to start a new process for each request. On the other hand, there is no link to the syntax of the PHP extension. Such a demon can be written not in C, but in something more friendly, for example, Go.