Pulsing Emission value causing stuttering

I'm using a simple script to pulse the emission parts of my material. It works nicely as I want it to, but whenever it's active it's causing my game to stutter when my player moves around.

This is the code I am using:

Code (csharp):

1.  
2. public class emissionPulse : MonoBehaviour {
3.  
4.         public float frequency = 1f;
5.         public Material material;
6.         public Color emissionColor;
7.  
8.         // Use this for initialization
9.         void Start()
10.         {
11.         emissionColor = material.GetColor("_EmissionColor");
12.         }
13.  
14.         // Update is called once per frame
15.         void Update()
16.         {
17.             float glow = (2 + Mathf.Cos(Time.time * frequency));
18.             material.SetColor("_EmissionColor", emissionColor * glow);
19.         }
20. }
21.  

Anyone know why this is happening or another way to achieve this effect?

Thanks.

 

Put all that math inside your shader. Throw away your script. It'll be much faster.

 

Using a shader is probably a better idea, thanks.

 

I don't see how the performance would change at all unless the OP is missing out a ton of info like he's spawned 100s of these.

 

Nope there is only one object.