unity3d - Unity UI Text with markup tags - "String too long for TextMeshGenerator" -

i have text ui component in have 20 lines of 100 character long columns. works fine. if try enclose each character inside <color> </color> tags give them different colors, following error messages:

string long textmeshgenerator. cutting off characters.

argumentexception: mesh can not have more 65000 vertices

i don't understand why tags count towards character limit, or why increase number of vertices.

what best way solve this? using unity version 5.4.1f1.

i believe unity uses 4 vertices/2 triangles per character, , rich text effects , outline/shadow effects duplicate geometry when applied (i using outline , on text.text , can too-many-vertices message much, smaller strings 20x100 chars).

my use case scrolling activity log, different case. solutions people have suggested issues:

• use "paging" system instead of by-line-scrolling, limited amount of text displayed @ given time remains accessible
• use 3rd-party solution textmesh pro
• add multiple text elements scroll view content window, no text can overwhelmed vertices, , use content size fitter keep scrolling functionality

haven't attempted these yet, maybe work you.