Use of Replay Gain effect in Win 10 Audacity 2.3.0

I recently updated from Audacity 2.1 to 2.3.0 and am happy with it except for how it handles the replay gain effect. It takes about 5 times as long to process in 2.3.0 as it did in 2.1. For example, a 40 minute monaural recording took 4 1/2 minutes. Can anyone tell me how to improve this?

The replay gain effect is a Nyquist effect. Unfortunately all Nyquist effects run slower in Audacity 2.3.0 on Windows, but the good news is that this has been fixed in the 2.3.1 version that is scheduled for release next month.