Recommendations for choosing a programming language [closed]_问答_开发者

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Days ago I created a program in Python to download stuff from the Internet, doing HTTP POST and GET and parsing JSON objects. I noticed some slow performance and I was thinking about writing it from scratch using another language, so I started to write it in C++ to make it faster. Finally I give up, C++ wasn't made for the Internet and it's very difficult to get something working.

I wa开发者_如何学Cs thinking about giving C# or Java a try, which would you recommend? (I need my program to be fully cross-platform, other programming languages are valid too)

Edit: You can check the source code here: http://code.google.com/p/grooveapi/

Rewriting an IO bound application in a different language is unlikely to make any difference in its execution speed.

If you need it to be cross-platform: (i.e. you just write it once and it can run anywhere) Then Java or Python are your only options. This is because any C variant will need compiling specifically for the platform you intend to use it on.

My suggestion: Out of the two I would suggest Python. I have be educated in Java at University, and have learnt Python myself. Python is the language I turn to for web programming projects (in the form of Django on a larger scale) and the language used at companies I have worked for inside of their web applications.

Before you switch to another language... are you sure the performance problems are due to the language itself? It can very well be possible the problem is in the program, or the network latency or any other reason.

Don't blame the language before you've profiled your application carefully, maybe you have a bottleneck somewhere. The cost of a new development will be always very high, specially compared to a few line changes if you've found a problem in your code.

how did you notice "slow performance" when using python? I mean, python is slow, ok, but for your use case it shouldn't matter. Did you profile the code? Can you paste the code here so we can take a look and maybe improve it?

I don't know what kind of performance issues you had with your program in python but it usually does great for me ( scripts parsing log files that are huge take really little time for instance...). now It all depends on the general purpose of this. If its just a script, no gui etc.. then you should definitely look into optimizing python, or doing some perl or php-cli script. I'm not familiar with it first hand but ruby seems to have a big following and seems very "internet" oriented aswel.

If you do want to create something more than a script you have lots of options, c# is one of them, but it won't be cross platform, i'd go with java.

In the end I'd recommend rechecking your python code, it seems odd that its not doing what you want performance wise.... python is really good.

You should choose the language you feel most comfortable with. In most cases the performance of the scripting language is not the bottleneck. It is more important to get things done quickly and keep it maintainable. I would recommend you to choose Ruby or Python. If you have to get Python faster you still can choose to use JIT implementation like PyPy. Actually quite high traffic webapps, like YouTube, use Python.

I'd go with the good, old PHP! It has proven time and time again, that it is more than capable of doing this, and is quite easy to learn.

So my advice: Go with PHP!