Baidu Analytics Drags Down the Site Response Speed Score

A while back I had just used Baidu Analytics to get the site’s response speed to a perfect score, and two days later it dropped again - really frustrating. What on earth was going on? I had to start analyzing the cause from scratch. The Baidu Analytics test showed a pile of warnings: images too large, no Gzip compression… First let me analyze: it only appeared after I enabled pre-caching with wp super cache - no Gzip compression. Turning off pre-caching solved the problem. The image problem was because I uploaded screenshots directly without saving or converting them to web format, which made the images fairly large, and loading them naturally took time. Also, the homepage updates whenever the articles update, so a slow response speed isn’t really a big deal.