title: Is there an impact to do not use an activated Attrib?
body: <p>Should I disable shaders attributes when switching to a program shader which uses less (or different locations of) attributes?</p>
  
  <p>I enable and disable these attributes with glEnableVertexAttribArray()/glDisableVertexAttribArray().</p>
  
  <p>Is there any performance impact, or could it bring some bugs, or doing enable/disable will be slower than activate all attributes and let them activated ?</p>