add a note about switched goto for future reference
// http://gcc.gnu.org/onlinedocs/gcc-3.1.1/gcc/Labels-as-Values.html
// Enabling this speeds up the main dispatch loop a bit, but requires compiler
// support.
-//
+// see https://bullno1.com/blog/switched-goto for alternative
// Defaults to true on supported compilers.
#ifndef WREN_COMPUTED_GOTO
#ifdef _MSC_VER
