I'm having some problems with Hummingbird script/css concatenation.
(1) Hummingbird doesn't seem to want to concatenate any js or css, even though I have asked it to. Why might this be? Other similar plugins (e.g. bwp-minify) are able to concatenate the files without problem.
(2) Hummingbird wasn't updating CSS after I updated underlying css files. I managed to fix it by turning everything off and resetting things, but it would be good to understand how/when Hummingbird updates things. In the past (e.g. with bwp-minify) I used my theme's version number to indicate that css has changed, and bwp-minify always respected that and rebuilt things. Does Hummingbird change the minified/concated file names on every change? I use Cloudflare, so it's important that it does that or Cloudflare will just keep serving the old version of the concatenated file.
I also have one question about how Humming bird works. It lists scripts & css which are only loaded when I am logged in. If I select concat for those files, does it mean that they will be concatenated with everything else even when the site viewer is not logged in, or does it concat logged in scripts/css separately and only load them when logged in?
Finally in the Hummingbird dashboard for minification, it states that I have 12 files, and that their combined size is 1831kb, of which 1434kb is css. Where do those numbers come from? 1.4mb of css would be somewhat ridiculous, and I don't see more than about 200kb of js and css when I look at the detailed listing of all files.