SUMMARY

When creating a new ledger entry from an existing entry it takes multiple seconds from clicking on the previous entry until the new entry has been filled in. 


STEPS TO REPRODUCE

With existing ledger entries

1) click on "new"
2) Fill in the "Pay to" with a value that's already been used. 
3) In the pop-up list of past entries pick one and double click on the entry 
   or click OK, same behavior)
4) wait, notice that the CPU goes to 100% on one core for multiple seconds 
5) note that values are finally filled in 
6) also note that the cpu says high for a few more seconds

OBSERVED RESULT

The values take about 10 seconds (on my non-high-end 2016 4-core) to be filled in. 


EXPECTED RESULT

In version 5.0.1-2 this was essentially instantaneous, which doesn't seem like an unreasonable expectation. 


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: just installed ubuntu 20.04 

(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version:  5?

        libQt5Xml.so.5 => /lib/x86_64-linux-gnu/libQt5Xml.so.5 (0x00007f033bfc3000)  
	libQt5DBus.so.5 => /lib/x86_64-linux-gnu/libQt5DBus.so.5 (0x00007f033bf27000)
	libQt5Core.so.5 => /lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f033b9de000)

ADDITIONAL INFORMATION

I sent a note to the mailing list and Dawid Wrobel said he's been seeing the same thing in 5.1