Text layers are painfully slow to work with.

Hello everybody, 

I really have the same issue, any solution so far ? 

I spend three days working on a project that cool takes only one hour, only just because of this font's issue. The only solution I know so far is to replace the missing font one by one in others to have the AFX working smoothly again. 

Let say if you have 2000 Layes with missing font in different comp, this is not going to be solved manually. All the giving solution in this discussion did not solve the issue. I just spend another day out trying those solutions with fails.

This is so stressful !! It's worst than rendering 3D in 1997

This happnes a lot when you use project that are created by others and they use different versions of the fonts you're using. although you're both using the same font - sometime the verstions differs and need to be updatesd.
Whenever this happens to me I use this script to replace all the fonts in my project to updated fonts with a single click.
worth checking out.

https://www.vdodna.com/tutorials/fontmate-tutorial/

Check and see if you have the same issue if you change your font to a common font like Arial, Helvetica, etc.  I've had this exact same problem in the past (and am having it today, with Rubik font).  Super slow performance.  Then I change the font to something like Helvetica and everything is fine.  I'm on a MacBook Pro running CC2020.  FYI, I had an issue in the past on a PC machine where I was using some grunge style font.  After Effects slowed down to a crawl.  But, that same font in After Effects on my MacBook Pro had no issues at all.

I don't know if this will help anybody, but I've been using Textor to do my by-letter or by-line text animation, and with AE2020 the render turns to crawl with just one text animation even when the text is not animating.

I noticed that by turning off the "Per Character 3D" by clicking the 3D layer option (you should see a pair of cubes in the 3D Layer toggle where you would normally see just one cube if 3D layer is enabled), it helped regain the speed somewhat. Of course that means I won't be able to see any z axis animation, but I rarely use it, so it wasn't an issue for me.

I've been struggling with exactly the same problem for weeks.  I've a load of ongoing projects with tons of animated text.  These are short films for banking products so then need updating constantly.  The problem does seem to lie with where the text was coppied from and what data it brought with it.   There's a script available from here for $39

https://aescripts.com/pt_textedit/ 

Basiaclly it allows you to edit all the text layers in a project simultaneously.  So just by changing the font across the entire project the changing it back again you can solve the issue. 

(deleted)

I just made one simple test.
As I mentioned before in my case it slows down specially when text is copied from Illustrator text layer. I guess it's possible that it pastes much information what After FX doesn't need.
When I rewrite all those texts with the keyboard using After FX text tool and formating them in AFX to get the same look - renders are quick again and everything seems nice.
I don't know ... maybe it is worth to try in your project?

I have the same problem.
Just one solid background with no effects, 2 shape layers with primitive objects and 3 text layers each containing about 20 letters, not more. The only animation is the character scale. This setup is enough to kill the performance. That's nonsense!
Mostly it slows down when text layers contain the text copied from Illustrator text layer. If I convert text layers to outlines and import them in AFX as an asset - renders and all the performance gets back in a normal state. I can't explain it in no way. Still thinking - is it an AFX or Computer failure and how to fix it.
I would agree to share my project file if somebody would like to test it on another machine.