DerelictGL3 slow compilation speed with contexts

[Igor via Digitalmars-d-learn]

Hi All,

I switched from using free functions in DerelictGL3 to 
DerelictGL3_Contexts and compilation speed in optimized build 
using DMD went from 2 seconds to 7 minutes and using LDC from 2 
seconds to 10 seconds. Is this a known problem? Are there any 
workarounds?