answer TTFB I expect 10 to 20 seconds of time I can’t understand why. Tell me how to improve it.
install Aoe_profiler https://github.com/AOEpeople/Aoe_Profiler
Aoe_Profiler is a drop-in replacement for the Varien_Profiler. It can be activated in the configuration and doesn’t require you to change any core files. It captures all data and also records its hierarchal information and displays everything in a nice way.
you will see magento issues