How do I measure the execution time of JavaScript code with callbacks?

Question

I have a piece of JavaScript code that I am executing using the node.js interpreter.

for(var i = 1; i <         


        

Answer 1

var start = +new Date();
var counter = 0;
for(var i = 1; i < LIMIT; i++){
    ++counter;
    db.users.save({id : i, name : "MongoUser [" + i + "]"}, function(err, saved) {
          if( err || !saved ) console.log("Error");
          else console.log("Saved");
          if (--counter === 0) 
          {
              var end = +new Date();
              console.log("all users saved in " + (end-start) + " milliseconds");
          }
    });
}