It still can reproduce the issue on v17.1.0 beta 4.
Step 1. Fresh EmEditor v17.1.0 beta 4, initial launch and open a file with 100000 lines of “0123456789”.
Step 2. Extract “\d” with Regexp -> 0.547 sec, OK
Step 3. Check the Output Bar check box, and then Extract “\d” with Regexp -> 7.703 sec, OK
Step 4. Uncheck the Output Bar check box, and then Extract “\d” with Regexp -> 54.9 sec, speed is very slow than step 2.
