12. GLSL Efficiency

• Vector operations are supported by GPU hardware directly

• This is slower:

  
      vPos.x = vPos2.x + 1.0f;
      vPos.y = vPos2.y + 3.0f;
      vPos.z = vPos2.z + 2.0f;
  
  

• This is faster:

  
      vPos.xyz = vPos2.xyz + vec3( 1.0f, 3.0f, 2.0f );