Just to update some : insert mashine from scratch all stereo out (no template) is doing 3 sec !!!
so as my template contains buses assignation and plugins ...i suspect X3 to deal with plugins or buses , way slower than X1
This might be simply the PC also that is heavier ...can say ....hope bakers will investigate .....
EDIT : ok trying to isolate the issue : Buses and plugins not the culprite as i rease them and created a simple template .....
ok i thought it was the icons but just the same multi instrument inserted from browser : 3sec and from template : 55 sec so saved in template is making the insertion super slow , conclusion :
BAKERS CHECK TEMPLATES !!!!