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Most of my application is written in PHP ((Front and Back ends). There is a part that works too slowly and I will need to rewrite it, probably not in PHP. What will give me the following:
1. Most speed
2. Fastest development
3. Easily maintained.
I have in my mind to rewrite this piece of code in CPP as a PHP extension, but may be I am locked on this solution and misses some simpler/better solutions?
The algorithm is PorterStemmerAlgorithm on several MB of data each time it is run.
The answer really depends on what kind of process it is.
If it is a long running process (at least seconds) then perhaps an external program written in C++ would be super easy. It would not have the complexities of a PHP extension and it’s stability would not affect PHP/apache. You could communicate over pipes, shared memory, or the sort…
If it is a short running process (measured in ms) then you will most likely need to write a PHP extension. That would allow it to be invoked VERY fast with almost no per-call overhead.
Another possibility is a custom server which listens on a Unix Domain Socket and will quickly respond to PHP when PHP asks for information. Then your per-call overhead is basically creating a socket (not bad). The server could be in any language (c, c++, python, erlang, etc…), and the client could be a 50 line PHP class that uses the socket_*() functions.
A lot of information needs evaluated before making this decision. PHP does not typically show slowdowns until you get into really tight loops or thousands of repeated function calls. In other words, the overhead of the HTTP request and network delays usually make PHP delays insignificant (unless the above applies)
By committing to a custom PHP extension, you add significantly to the base of knowledge required to maintain it (even above C++). But it is a great option when necessary.
Feel free to update your question with more details, and I’m sure Stack Overflow will be happy to help out.