nodejs where declare variable using require

Question

nodejs where declare variable using require

i would to know what's the best way between these two codes:

module.exports = function(){

    require('fs').readFile..
       crequire('./sockets.js').clients..
       ...

};

second:

var fs = require('fs');
var clients = require('./sockets.js').clients;

module.exports = function(){


    fs.readFile...
       clients...

}

I search the best way to optimize.

Thanks !

node.js

Answer 1

From performance point of view there is no difference, because require is cached after first call. But still I think that the code is more readable when you declare imports at the begining of the script. Thus the second version is prefered, imho.