I need a little help regarding the performance test result within the Hummingbird admin area. The majority of listed results are almost 100/100, but one is just 18/100. The recommendation says I should remove render blocking resources. When clicking on the 'Improve' button I see a statement saying:
Your page has 30 blocking script resources and 24 blocking CSS resources. This causes a delay in rendering your page.
At the bottom of the page I then read:
Note that it can be very hard to get a perfect score for this rule. Some plugins and themes due to their design may not be able to handle their scripts deferred to the footer without breaking, so will have to be left in their original position. And often combining and minifying all CSS files will not completely remove their impact on your score. Just try multiple combinations to improve this score as much as possible.
So what exactly can I do? The list contains lots of js and css related URLs of plugins and the activated theme. Each of it might be important for proper functions. How can I at least approach this issue?