Hey @tlmn ,
I Just debugged the slowness issue, it seems to be because each element is detached and that’s causing an extra API call. As a matter of fact, 455 * 0.15-0.3 sec results in approx 2 min.
Can you disable detaching on your source elements and try again?
I’ll also ping @dimitrie to see if it’s normal that the object loader takes so long to retrieve such simple objects. Ofc, the calls could be parallelized as well…
PS
Load last received works much faster as it’s pulling some cached data 
Normal receive:
Receive last selection:
