Drupal performance issue - too much time to establish a connection!
Finally found problem - panel templates in my theme

for those who experience same , can follow these steps 


my site is optimized with APC and mod_deflate, so in pagespeed for chrome test, its 93/100
real problem was waiting time . chrome network analysis shows first GET took approx 18+ sec , then loading of other elements is real quick
after several test, i found my theme is causing delay. so i put a blank page.tpl in my theme. And you know it took 12+ sec to load that blank page! so it was not any db query problem!
so problem must be with .info, disabled css, then js, still no improvement
finally removed panel template declaration from .info , and now site took .3 sec to load!
next i tried with only one panel template in my theme, site took 1-2 sec


I have 10 panel templates in my theme.so panel templates affects site performance!