Prerequisites

• I have searched open and closed issues for duplicates.

Describe the bug

When there is a large amount of text in any terminal tab (including the tab you are not on) and you change the font size, there is a large lag.

To Reproduce

Steps to reproduce the behavior:

1. Open Terminal
2. Run the yes command and let it run for 10-20 seconds (or more)
3. Press Ctrl-+ and Ctrl-- and notice the slowness.

Expected behavior

Immediate response to zoom in/out regardless of buffer size.

Platform Information

• I'm using the latest version from git that I've manually compiled
• I'm using the latest released stable version