Why does FBX import take so long for a large high poly mesh?

I was able to comment this line out of the source code and save a ton of time. It really puts the FBX import process on cruise control.

From: Runtime/Engine/Private/StaticMeshBuild.cpp

// FMessageDialog::Open(EAppMsgType::Ok, WarningMsg);

I am not a programmer but to do this wiith the source code is a huge deal. My import time is now 2.5 hours. Geometry looks great aside from the errors it was reporting.