How to access data from another component? IE: Show your HP on screen

Lets say your "Health" component knows how much HP you have. Now let's say I want to print that number on screen.

I have a system that looks for the Text and then looks for the Data containing entity (player) and then prints the data.

I got it working.

But putting a for each inside a for each sounds like a performance killer :S

Is this the correct way?

Code (JavaScript):

1.         OnUpdate():void {
2.             this.world.forEach([ut.Text.Text2DRenderer,TagHPShow],
3.                 (text) => {
4.                     this.world.forEach([Health,TagPlayer],
5.                         (data) => {
6.                             text.text = Health.remaining + "/" + Health.total;
7.                         });
8.                 });
9.         }

Thinking in Systems is hard