Job template page takes a long time to load

[yakanechi]

What happened:
When we try to open the Job Template Details page, we get a long wait time.
This is especially occur in templates with many template use jobs.

What you expected to happen:
The job template detail page will load immediately.

How to reproduce it:
Open a detailed page of job templates used for many jobs.

[VonnyJap]

Closing ticket since the work is completed. Please feel free to reopen if otherwise.