Very high CPU usage for 7.6.0-2119 compared to 7.2.3

When we triggered the run for SDK FIT test suite, CPU usage for 7.2.3 was ~0% while the same set of tests plus test for new trinity feature made CPU usage hitting 95%. Below is the screenshot of dashboard:

For 7.2.3:

and for 7.6.0:

We suspect, memcached was the process using the large CPU amount as seen in another test during investigation by Graham Pople:

Attaching cbcollect logs for both clusters for your reference.

Thanks!