LTspice 24.1 Much Slower than 24.0: "Initializing Circuit Matrix" Takes Significant Time in Former

Dear ltspice software team!

Simulting the same circuit with ltspice 24.0.12 and 24.1.1 i encountered big differences in simulation runtimes

I know that my circuit is very special (60bus problem of high energy loadflow computation) and the circuit has many floating nodes (for measurement purpose)

The timedifference is about 3s for ltspice 24.0.12 to about 20s with ltspice 24.1.1 

Especially the iniitialization of the circuit matrix is much more time consuming for version 24.1.1 as for version 24.0.12

I added my simulation files hopeing you can optimize the initialization routine of the matrix

Regards,

Friedrich

NOTE: The main file of this example is 60-bus-example_pv.asc

60-bus-example.zip