Part of troubleshooting for SharePoint application slowness, we might have to collect the memory dumps.
When we do a manual host entry in client machine and point to any WFE, if you find the slowness with any site, we can collect memory dumps. You can use task manager or Procdump tool to collect the dumps from respective servers.
a. Download the tool from the below location and extract in folder of server where you have enough free space like above 10GB.
b. Open the command prompt and change the directory to procdump location.
c. Start loading the URL which is slow and simultaneously run below command in command prompt at server. You can collect 2-3 dumps while loading the same site for comparison.
procdump -ma PID #Here PID is process ID of affected site.