Startup time regress 2x

Summary:

Our startp times on windows are getting worst and worst

version	time
0.925	2-3s
1.01	5s
1.1.2	5s
1.2A	10-12s
1.3A	14-16s
1.4 A	15-20s
1.5 - master	17-25s

Version info

Win 10 i7 i7-6800K CPU @ 3.40GHz 3.40 GHz 16GB ram