Terrible Time to First Byte on Dreamhost PS

I’ve been struggling with extremely slow load times on a Wordpress site. Originally I thought it might be due to the shared hosting plan, but after moving to a PS it’s still taking between 12-20 seconds on the TTFB.

The site is http://www.hytechautotrim.com. Here’s a link to recent WebPagetest results: http://www.webpagetest.org/result/130427_HQ_JKT/1/details/

Any ideas?

It looks like one of our guys emailed you some suggestions, one of them being to remove the wordpress-seo plugin, as it can cause memory issues. If you still need any assistance with fine-tuning your WordPress site, please don’t hesitate to reply to our last email. Thanks! :slight_smile:

With all the plugins disabled, I am having 20 seconds for time to first byte http://www.webpagetest.org/result/130629_G6_HC7/1/details/

I have noticed that page loads OK during some time of the day (morning, Spain time) but gets incredibly slow during the other part of the day.