Deprecated performance profiling guide in ue4

Very useful article: http://www.gamasutra.com/blogs/LeszekGodlewski/20160721/272886/The_Vanishing_of_Milliseconds_Optimizing_the_UE4_renderer_for_Ethan_Carter_VR.php

Useful Commands:

stat fps
stat unit
stat unitgraph
stat raw
stat scenerendering	Overall Scene Rendering Stats
stat particles	show particle stats
stat shadowrendering	CPU Render Thread time ussuing shadow depth calls
Profilegpu	Measures GPU execution time
stat d3d11rhi	D3D Driver rendering times
showlog
Vis
freezerendering

Typing 'show' then enter shows you all the things you can turn on or off to see if perf goes up or down.

show staticmeshes	Turn on or off static meshes
show particles	Turn on/off particles
show translucency
show postprocessing
show skeletalmeshes

DumpShaderStats	Dump Shader Stats
stat Slow [-ms=0.3] [-maxdepth=5]	Command will dump all stats taking longer than specified ms & lower than specific nested depth in their grouping. Really useful for quick perf tests if you don’t have access to profiler. "stat grouped" disables it