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POJSON.stringify node server memory leak
 

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  1. POJSON.stringify node server memory leak
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    <p>In my memory heap snapshot for my node.js server, I noticed I'm leaking a crazy amount of memory because of the string this function produces: </p> <pre><code>User.prototype._friends = function(friends) { this.friends = friends; this.send(JSON.stringify({ type: 'hello', username: this.data('username'), friends: friends })); }; </code></pre> <p>These are the other two send functions. It goes from .send to ._send.</p> <pre><code>User.prototype.send = function(code, message, callback) { this._send('listener', code, message, callback); }; User.prototype._send = function(type, code, message, callback) { if(!message &amp;&amp; typeof code != 'number') { callback = message; message = code; code = 200; } if(typeof message != 'string') message = JSON.stringify(message); if(type == 'connection' &amp;&amp; this.connection) { this.connection.writeHead(code || 200, { 'Content-Type': 'application/json', 'Content-Length': message.length }); this.connection.end(message); message = null; return; } else { if(!this.listeners.length) //???? WHY return this.message_queue.push(arguments); var cx = this.listeners.slice(), conn; this.listeners = []; while(conn = cx.shift()) { conn.writeHead(code || 200, { 'Content-Type': 'application/json', 'Content-Length': message.length }); conn.end(message); } if(callback) { callback(); message = null; } else{//added this in... message = null; return; } } }; </code></pre> <p>The type of message that takes up most memory is "Hello". _friends is called by code in another middleware file that will put information from a php server through Ajax calls. Not sure how relevant that is since the memory leak looks like to be after that step. Any pointers in the right direction would be greatly appreciated. </p>
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    1. USArjun Patel
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    1. COThe methods look ok. The question is how you use them and where are these friends coming from. I mean in `_friends` method.
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      1. POJSON.stringify node server memory leak
      1. USKrasimir
    2. COHow do you know you have a memory leak?
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      1. POJSON.stringify node server memory leak
      1. USAndreas Hultgren
    3. CO@AndreasHultgren I know it's a memory leak because this part of our code is most questionable and Nodetime is telling me there are nearly a million of these strings allocated in memory. Once request for the data is through and sends it over to the client broswer, this stuff should be garbage collected but it's not and ultimately crashes the server.
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      1. POJSON.stringify node server memory leak
      1. USArjun Patel
 

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