Sidescroll game, the character pauses while advancing

Hello again.

I'm trying to make a sidescroll minigame. The script that I use to move the character is this (the frames are in 60):

function Main() {

createjs.Ticker.addEventListener("tick", this.update.bind(this));

canvas.onmousedown = this.userPressed.bind(this);

window.onkeydown = this.userPressed.bind(this);

}

Main.prototype.update = function (evt) {

console.log("Main::update()");

}

Main.prototype.userPressed = function (evt) {

exportRoot.mc_Sebastian.x += 3;

}

var main = new Main();

+++++++++++++++++++++++++++++++++++++++++++++++++++++

It works, however at the time of making the animation the character advances 3 pixels (determined by a variable), makes a minimum pause and then continues with a fluid advance.

You can try the script by adding a movieclip, it will surely be easier to see on the screen. That little pause is the one that does not allow to see a fluid movement. Hopefully you can help me with a tutorial that already exists or with an example on which I can base myself.

As always, thanks for the help.