Magento performance optimization is our strength
Google is giving more SEO value for a site with speed and reports suggesting that a site slower will lose considerable traffic and sales.
1. Server execution time: TTFB( Time to first byte)
2. Time to download supported CSS, js, images etc(document download time)
With Magento, TTFB should be less than 1 seconds (some experts suggest 0.3 seconds should be considered as standard time). Using the proper caching system, redis and standard coding plus discussing on what shall be avoided at design level TTFB can be considerably reduced.