cubicweb-container #3521652 [clone] performance is subpar in _etype_create_clone [resolved]

Pb. is even though we read all etype entities in one request, we send the copie back one by one.
Something should be done.

prioritynormal
typebug
done in2.3.0
load1.000
load left0.000
closed by#cf3563ac9ac2 [clone] create entities all at once, per etype
patch[clone] fix inlined relation handling [applied][clone] provide a _fast_reserve_eid method to avoid one commit per eid [applied][clone] create entities all at once, per etype [applied][clone] create entities all at once, per etype [folded]