Report of slow compilation time with Shadertoy Mona Lisa example

https://www.khronos.org/bugzilla/show_bug.cgi?id=870 describes a shader which 
takes a very long time to compile, apparently only on Windows machines with 
NVIDIA GPUs. I don't have a Windows machine with an AMD GPU to test with to see 
if it only reproduces there:

https://www.shadertoy.com/view/MsX3WH

Chrome's infrastructure appears to be working as expected; the Chrome process 
becomes unresponsive for a few seconds until the GPU process's watchdog fires, 
and WebGL is disabled for the domain. The questions are (a) whether the failure 
is NVIDIA-specific and (b) whether anything can be done to reduce the 
compilation time. There aren't any loops in the shader, so time is probably 
being spent in register allocation in Microsoft's shader compiler, or somewhere 
similar.

Original issue reported on code.google.com by kbr@chromium.org on 20 May 2013 at 8:01

Merged into: #425

ValhallaTeam / angleproject

Report of slow compilation time with Shadertoy Mona Lisa example #426