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    <p>You can have a look at <a href="https://github.com/nodejitsu/node-http-proxy" rel="nofollow">node-http-proxy</a> module and how it handles the connections. Make sure you don't buffer any data and everything works by <a href="https://github.com/substack/stream-handbook" rel="nofollow">streaming</a>. And you should try to see where is the time spent for those long requests. Try instrumenting parts of your code with <a href="http://nodejs.org/docs/latest/api/all.html#all_console_time_label" rel="nofollow"><code>conosle.time</code></a> and <a href="http://nodejs.org/docs/latest/api/all.html#all_console_timeend_label" rel="nofollow"><code>console.timeEnd</code></a> and see where is taking the most time. If the time is mostly spent in javascript you should try to profile it. Basically you can use v8 profiler, by adding --prof option to your node command. Which makes a <a href="http://code.google.com/p/v8/wiki/V8Profiler#Process_the_Generated_Output" rel="nofollow">v8.log</a> and can be processed via a <a href="http://code.google.com/p/v8/wiki/V8Profiler#Process_the_Generated_Output" rel="nofollow">v8 tool found in node-source-dir/deps/v8/tools</a>. It only works if you have installed d8 shell via <a href="http://www.scons.org/" rel="nofollow">scons</a>(scons d8). You can have a look at <a href="http://blog.arc90.com/2012/03/05/profiling-node-programs-on-mac-os-x/" rel="nofollow">this article</a> to help you further to make this working.</p> <p>You can also use <a href="https://github.com/c4milo/node-webkit-agent" rel="nofollow">node-webkit-agent</a> which uses webkit developer tools to show the profiler result. You can also have a look at <a href="https://github.com/alfred-nsh/node-webkit-agent" rel="nofollow">my fork</a> with a bit of sugar.</p> <p>If that didn't work, you can try <a href="http://blog.nodejs.org/2012/04/25/profiling-node-js/" rel="nofollow">profiling with dtrace</a>(only works in illumos-based systems like SmartOS).</p>
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    1. PO“Proxying” a lot of HTTP requests with Node.js + Express 2
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    1. COI should read payload, decrypt it, and send further to remote server. Then I read reply from remote, encrypt it and send back. Most time is IO with remote. But what I'm facing is following: let's say ab sends 20 request, but express calls route callback way too much times (like thousand times). Any advice on that?
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    2. COThat doesn't seem right. Maybe in one of the middlewares multiple times you call the callback(`next`). Check all of them. And looking at your code, you should be streaming(as opposed to now), but you can't use express midllewares like that.
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    3. CO**Firstly**, I can't stream. I need to have whole body to decrypt, whole remote response to encrypt. I mean yeah, I could stream hex to cipher, and, from there, decrypted body to remote and back, but that's just pain in the ass (+ authorization would be tricky to implement). So I stick with current approach. **Secondly**, I can't use express middleware how, exactly?
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