Xcache used, still need GZIP enabled?

[basketmen]

Hi guys, just helping my friend, he installed xcache and use it in vb

before installed xcache, he use admincp >> vbulletin options >> Cookies and HTTP Header Options >> GZIP set to Yes, its works make the pages become smaller size about 80%

so now still he need GZIP enabled? so they can work together

please share your knowledge and experience, just still new using xcache