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

Hi Friedrich ,

I see the difference in the simulation time.

but its not as long as 20s for me, its only about 10s-14s tops.

Nonetheless, have you tried checking for LTspice software updates yet? This could have been addressed already.

If you had already updated your LTspice, may I ask if there are changes in the expected performance of your simulation or only the simulation time had changed?

Best Regards,
EArl

Hi Friedrich , EarlJohn ,

LTspice 24.1.1 is the latest publicly available. Took me 2s in LTspice 24.0.12; 16s in 24.1.2 (soon to be released). The time difference is interesting, mostly spent in the "Initializing Circuit Matrix" message, as stated. For fun, I netlisted from 24.0 and ran the netlist in 24.1.2 and had the same result. Looks like your Gear method took the longest. I matched everything: Modified Trap.

mike

Hi Friedrich , EarlJohn ,

LTspice 24.1.1 is the latest publicly available. Took me 2s in LTspice 24.0.12; 16s in 24.1.2 (soon to be released). The time difference is interesting, mostly spent in the "Initializing Circuit Matrix" message, as stated. For fun, I netlisted from 24.0 and ran the netlist in 24.1.2 and had the same result. Looks like your Gear method took the longest. I matched everything: Modified Trap.

mike