MiIsImportOptimizationEnabled

BOOL __stdcall MiIsImportOptimizationEnabled(){
  return(KiSpeculationFeatures & 0x4000000) != 0;
}

Referenced by:

MiApplyImportOptimizationToRuntimeDriver
MiMapSystemImageWithLargePage
MiParseImageLoadConfig
MmHasImageBeenImportOptimized