node.js - Node JS on AWS instance - is there a network limit? -

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so have instance (m4.large, if matters) on aws, , node js script crawling through 10k sites on web (specific ones).

on simple macbook pro, takes ~3 minutes. however, on aws it's slower , of requests gets lost (timeout), after running on few hundreds (i guess it's bug node?).

anyway, there network limitation on aws? can't more 14 concurrent connections. here's how send requests: 

    var request = http.request({         method: 'get',         host: websitedomain,         port: 80,         agent: agent,         path: '/'     }, function(response){         // code...     });


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