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POWhy is (mono) asp.net slower than php?
 

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  1. POWhy is (mono) asp.net slower than php?
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    <p>I have a simple hello world written in asp.net, php and regular html. They are being served by nginx using fastcgi for php5 and xsp (mono 2.6.7, fastcgi-mono-server2.exe 2.6.5.0). I am using a simple .NET script to make async web request. What i found was in the span of 1000ms</p> <ul> <li>php: 250-400</li> <li>asp: 120-140</li> <li>html: 600-900</li> <li>8k png: 250-300</li> </ul> <p>With a simple hello world app php is consistently 2-3x faster. Why is this? i always thought asp.net would be faster (and php startup would be slow). But it appears per request asp is significantly slower. Now i understand i am not actually comparing execution speed since its hello word and not complex code.</p> <p>What is the difference between the two backends to make this significant difference?</p> <p><a href="http://www.pastie.org/2609554" rel="nofollow">Here is the code i use to test the request</a>.</p>
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    1. COYou're trying to make *lots* of requests at the same time, in a pretty uncontrolled fashion. Now your client *may* be throttled by the number of requests it will issue to the same host at the same time - it depends how everything is configured... or it may be spamming the server with hundreds of requests at once. At that point, the behaviour will depend on how the server handles multiple connections. Note that your count increment is also not thread safe. Have you tried a *synchronous* fetch, so you're only making one request at a time, out of interest?
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      1. USJon Skeet
    2. COJon Skeet: I was unsure how thread safety would work. All i know is its equally unsafe to each of them. What class might i use to increment the count in a thread safe manner? If you look at line 31 you can see i do have a version that handles one request at a time.
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    3. COYou could use `Interlocked.Increment` for example. What's the difference in performance when you use a synchronous approach? Note that if there's nothing dynamic in the page, it may well be that PHP is better at noticing that than ASP.NET, and is basically caching. As with all benchmarks, you have to ask whether it's really measuring the scenario which is relevant to the application you're interested in.
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