I upgraded my Magento 1.4 to Magento 188.8.131.52. Upgrade completed successfully but after upgrading, admin panel is too slow. Sometimes, up to 1.3 minutes.
I enabled Magento profiler. Most time consuming calls were these:
Code Profiler Time Cnt Emalloc RealMem mage 33.0621 1 0 0 mage::dispatch::routers_match 32.9778 1 0 0 mage::dispatch::controller::action::predispatch 25.1045 1 9,281,168 9,175,040 DISPATCH EVENT:controller_action_predispatch 25.0586 1 3,260,744 2,621,440
I read some articles about speeding up Magento admin panel. Enabling cache and disabling extensions are done. When I disabled extensions, the speed significantly grow. But disabling them one by one didn't make any difference.
What should I do to find the bottleneck(s)?