fps drop #1
Recompiling fragment shader for program 3734
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
Recompiling fragment shader for program 3735
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
Recompiling fragment shader for program 3736
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
Recompiling fragment shader for program 3737
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696

fps drop #2
GTT mapping a busy miptree BO stalled and took 29.393 ms.

fps drop #3
Recompiling fragment shader for program 3741
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696
Recompiling fragment shader for program 3742
  EXT_texture_swizzle or DEPTH_TEXTURE_MODE 1672->2696