How can I detect where Dynamic font is used in my project?

Questions & Answers
1

My game suffers from the lag related to Font.CacheFontForText, which is apparently called with dynamic font.

But I believe I don’t use any dynamic font in my game, only bitmap font. All my labels use bitmap fonts.

How can I find where dynamic font is being used?

2

In your Hierarchy search bar,
type
ref:“MyAssets/Fonts/hemi head bd it.ttf”

// Where 'MyAssets' and 'Fonts' are folder names and 'hemi head bd it.ttf' being the font name.

OR
 
In your project panel , 
For Example :
Assets -> Fonts -> hemi head bd it.ttf 
being your Folder structure and font name respectively.
Right click on the Font Name and click 'Find References in Scene'.
This will show all the references in the Hierarchy where that font is being used.