I have been working on a website for a client and we are having awful issues with page load times. It seems to have gotten worse over the past week. So naturally we presumed that the more plugins or additional handwritten scripts that we put in play the slower it gets.
To do a test we were going to duplicate the site in its entirety and put it in as a subdomain on the same server. Then we were going to switch off all plugins and hand written scripts. We were going to see the difference in times and add bits and pieces one by one while measure the difference in speed.
However, once the subdomain was put in place it was immediately faster than the original. It didn't make any sense. It is using all the same resources. From 26 seconds to 6.5.
I have been on to the hosting provider about this an number of hours ago but I have heard nothing as of yet.
I ran a test with both URLs on webpagetest.org and the problem seems to lie with the First Byte Time. Although there are other speed issues mentioned in the report, them all combined add up to be just a small fraction of the delays in the First Byte Time.
Any ideas would be appreciated.