Slow performance after deleting slow Locus
File 1: Upon opening, you can move the foci (F and F') and the response is fast. Now add the command Locus(K, P). Moving F or F' is now slow and jerky (as expected). So delete the locus object. But moving F or F' is still slow and jerky; this is the problem.
File 2: Upon opening, moving F or F' is slow and jerky, because of Locus(K, P). So delete the locus object. Now moving F or F' is fast.
These files are the "same", except that file 2 has the locus.
System Information:[pre]GeoGebra Classic 5.0.535.0-d (21 April 2019)
OS: Windows 10
Architecture: x86 / x86
CAS: CAS Initializing