Fet 695 is slower than older versions (MA mode)

[fartoto_dz2004]

I noticed that production in the latest version is much slower than in previous versions.
For example, the same file on the same pc with ver 695 took about an hour, while with version 662 it took less than half an hour.

[YOUSSEF HOUIET]

You must use the same random seeds to confirm this result

[Volker Dirr]

I bet you didn't set the same seed both times if you measure the time, don't you?
Please repeat your test, but don't forget to start generating always with the same seed (see FET -> Settings -> Advanced -> Seed)

By default the seed is always different.

I recorded a few videos about speed on YouTube. Maybe watch one of them.
Maybe this one:
https://www.youtube.com/watch?v=MVt0Yb9y8xc&t=1s
I might do more vidoes about this topic if you want.

Only if you use Qt5 vs Qt6, then FET Qt5 is slower.
Or if you use FET 32bit vs FET 64bit, then FET 32bit is slower.

Or in very rare cases it might be also slower, but Liviu always wrote it in the changelog and news section in that case. A few versions are sadly slower then older ones, because we added so many new features and constraints.

[fartoto_dz2004]

I bet you didn't set the same seed both times if you measure the time, don't you?
Please repeat your test, but don't forget to start generating always with the same seed (see FET -> Settings -> Advanced -> Seed)

By default the seed is always different.

I recorded a few videos about speed on YouTube. Maybe watch one of them.
Maybe this one:
https://www.youtube.com/watch?v=MVt0Yb9y8xc&t=1s
I might do more vidoes about this topic if you want.

Only if you use Qt5 vs Qt6, then FET Qt5 is slower.
Or if you use FET 32bit vs FET 64bit, then FET 32bit is slower.

Or in very rare cases it might be also slower, but Liviu always wrote it in the changelog and news section in that case. A few versions are sadly slower then older ones, because we added so many new features and constraints.

Yes the latest version is slower than older versions, Thanks for your explanations.

[Volker Dirr]

FET 6.9.5 has the very same speed like FET 6.6.2.

There where only a very few slowdowns. The last one was with FET 6.5.0, but only if you use constraints of type students (set) max span per (real) day.
But that was needed, since the old version was wrong (sometimes).
You won't notice a slowdown if you donn't use that constraints.

The last slowdown for "normal" guys was very long ago (Liviu added virtual rooms).

There are also many versions that increases the speed. For example from changeing from Qt5 to Qt6 was a big speed improvement.