As you can see from table above - we can say that Juniper release at least not slower than Iris release, or even faster.
We can see slowness on IMTC1 env (it should be more powerful than others). However it's still better or the same as ICP1 (Iris).
The only difference between IMTC1 and JCP1 is state of DB (different data set may affect the performance).
We'll need additional tests on same data set but on different releases.