Hi Amol, there were a lot of performance improvements on the WFM with the Cumulative Update 3. Do you have that update installed, if not I strongly recommend that you do that and then check the performance.
Cumulative Update 3 for Workflow Manager 1.0 (KB3104066)
Must have the Cumulative Update for Service Bus 1.0 (KB2799752) installed on the entire computer farm before installing this update for Workflow Manager
1.0
https://www.microsoft.com/en-us/download/details.aspx?id=36794
This update can be applied to machines that have Workflow Manager 1.0 installed.
If the machine has Workflow Manger 1.0 installed, only Workflow Manager will be updated.
To update the Workflow Manager Client 1.0, you have to install Workflow Manager Client 1.0 CU3. Workflow Manager Client 1.0 CU3 and Workflow Manager Tools 1.0 CU3 are
MSIs that can be installed on a fresh computer or in addition to Workflow Manager Client 1.0 or Workflow Manager Tools 1.0 respectively
https://www.microsoft.com/en-us/download/details.aspx?id=50043
Also, check my blog post that shows you how you can check if you have the latest CU3
Five Steps to check your wfm
Hope that helps
Cheers
Please mark as helpful if this was helpful.
Thanks & Regards, Jose