disable the plugin "Related Posts By Taxonomy" only this, the page goes from 2/3 seconds faster. to deactivate the plugin, I saw nothing unusual on the web.

also I added the plugin "quick cache", do not need anything extra programming.

recompress the MiniPics, at 50%, the originals have very little compression.
Reduced to half the size of jpgs (wp-content/uploads/symbiostock_rf_content)

anyone knows any trick to make the web faster? 

Quote from: Roberto on August 23, 2013, 10:19
disable the plugin "Related Posts By Taxonomy" only this, the page goes from 2/3 seconds faster. to deactivate the plugin, I saw nothing unusual on the web.

I believe that the "Related Posts by Taxonomy" plugin is used by the Symbiostock Similar Images widget.  This is probably why you have a section on your image page called Similar Images and nothing is showing.

yes, you're right