ADDITIONAL SYSTEM INFORMATION :
Microsoft Windows [Version 10.0.17763.55]
openjdk version "12-ea" 2019-03-19
OpenJDK Runtime Environment (build 12-ea+19)
OpenJDK 64-Bit Server VM (build 12-ea+19, mixed mode, sharing)

Running on LG 4k monitor (3840x2160, 150% scaling mode)

A DESCRIPTION OF THE PROBLEM :
The font in Swing applications is too small by default on Swing applications running on HiDPI monitors on Windows starting on JDK 9. Earlier releases worked fine.

REGRESSION : Last worked in version 8u191

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run testcase

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Font size should be legible, ideally not much smaller than Metal L&F
ACTUAL -
Font size is extremely slow, making it virtually impossible to read the text

---------- BEGIN SOURCE ----------
1. Download SwingSet2 from https://github.com/iaavo/swingset2
2. Notice that default font size of frame tabs in Metal L&F is readable
3. Switch to Windows L&F
4. Notice that the font size of frame tabs is extremely small
---------- END SOURCE ----------

FREQUENCY : always