a patch for node.js which avoids loading the same module more than once

In a large project developed with node.Js, some modules are used frequently, let's say underscore or lodash. module A depends on underscore,and module B depends on it too, now they depend on the same module with same version. So module underscore is loaded more than once , right? And that will cost a lot memory, what a waste! .So why don't we set the cache for the same module with the same version. Well , module-unique can help you solve this!

npm install module-unique

add the code before your own code, must before or it won't work!!!

require('module-unique').init();

here is an example code

#!/usr/bin/env node
'use strict';
var unique = require('module-unique');
unique.init();
var app = require('../app'),
 logger = require('logger'),
 graceful = require('graceful');
app.set('port', process.env.PORT);
var server = app.listen(app.get('port'), function() {
 logger.info('server listening on port ' + server.address().port);
});
graceful({
 server: server,
 killTimeout: 30 * 1000,
 error: function(err, throwErrorCount) {
 if (err.message) {
 err.message +=
 ' (uncaughtException throw ' + throwErrorCount +
 ' times on pid:' + process.pid + ')';
 }
 logger.error(err);
 }
});

memory saved about 30% above in my own project, think about how much it will save you~

http://gtms02.alicdn.com/tps/i2/TB1OBmVGFXXXXaZXXXXhN4IGpXX-930-98.png

http://gtms03.alicdn.com/tps/i3/TB1nU9QGFXXXXb4XFXXDeGnJXXX-886-144.png