I'm currently working on improvements on load times and Time To First Byte for Magento 1.7.
Server side info: Dedicated server Running 1 Magento instance = 3 store views LAMP setup
Css & js merged, using CDN Built-in Magento cache enabled
I have attached profiler info from product page and as you can see ttfb is 1000ms.
I have been advised to use Full Page cache and Varnish cache, which I have set up and speed is noticeable on cached pages, but I would be more interested to get actual non-cached results around 200-400ms mark.
Any suggestions and thoughts would be highly appreciated.