As I'm sure many of you know, Google PageSpeed Insights will sometimes complain about what it calls "render blocking css" when you test your sites.
Their suggestion is to render only "necessary" CSS inline in the <head>. If you have CSS in an external file (as everyone does), the recommendation is to load this after the page loads. This seems pretty extreme, but that's the recommendation. It appears to be a big blocker to improving one's Mobile PageSpeed scores as well...
You can use the PageSpeed Module for Apache or nginx to help you identify which CSS is actually "necessary". Again, one can argue about the relative value of doing this, but it is Google's current recommendation.
I would then put <!-- W3TC-include-css --> inside a <noscript> tag, thereby suppressing the placement of the minified CSS, as well as ensuring it appears for non JS browsers.
So, the issue is I need to get the location of the minified CSS file somehow. Anyone know how one can access the location of minified CSS file with PHP in the footer?