Could you please confirm on the below.
1. With NS 10.5.57.7, the users which are not going through blueCoat proxy, how is their performance? Do they see the same latency issue or they work well?
2. Is all the clients using bluecoat proxy affected or only some of the clients?
3. Did you capture the trace on NS at the time of the issue, with NS 10.5.57.7 build?
4. Could you please mention the issue time (date and timezone) when it was observed and get the collector file uploaded.
5. What is the BlueCoat proxy IP that’s going to hit the netscaler.