UPDATE (21-Oct-2015): I got a workaround from the plugin authors (ThemePunch) and put it below.
So recently a bunch of our websites started suffering poor performance and very slow load times. Upon inspection of the HTML, we found a huge block of inline CSS (inline so its not even cached but loaded every time the page loads).
When I downloaded the HTML of one of our pages, it was 1.37Mb (this is just the HTML, no external files, images, etc).
Here’s a very small sample of it to give you an idea (and to help others fine this page via search engines):
background:-moz-linear-gradient(top,rgba(227,58,12,1) 0%,rgba(234,91,31,1) 100%); background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,rgba (227,58,12,1)),color-stop(100%,rgba(234,91,31,1))); background:-webkit-linear-gradient(top,rgba(227,58,12,1) 0%,rgba(234,91,31,1) 100%); background:-o-linear-gradient (top,rgba(227,58,12,1) 0%,rgba(234,91,31,1) 100%); background:-ms-linear-gradient(top,rgba(227,58,12,1) 0%,rgba(234,91,31,1) 100%); background:linear-gradient(to bottom,rgba (227,58,12,1) 0%,rgba(234,91,31,1) 100%); filter:progid:DXImageTransform.Microsoft.gradient( startColorstr='#e33a0c',endColorstr='#ea5b1f',GradientType=0 )}.fullrounded img {-webkit-border-radius:400px;-moz-border-radius:400px;border-radius:400px}.tp-caption a{color:#ff7302;text-shadow:none;-webkit-transition:all 0.2s ease-out;-moz- transition:all 0.2s ease-out;-o-transition:all 0.2s ease-out;-ms-transition:all 0.2s ease-out}.tp-caption a:hover{color:#ffa902}.tp-caption a{color:#ff7302;text- shadow:none;-webkit-transition:all 0.2s ease-out;-moz-transition:all 0.2s ease-out;-o-transition:all 0.2s ease-out;-ms-transition:all 0.2s ease-out}.tp-caption a:hover {color:#ffa902}.tp-caption a{color:#ff7302;text-shadow:none;-webkit-transition:all 0.2s ease-out;-moz-transition:all 0.2s ease-out;-o-transition:all 0.2s ease-out;-ms- transition:all 0.2s ease-out}.tp-caption a:hover{color:#ffa902}.tp-caption a{color:#ff7302;text-shadow:none;-webkit-transition:all 0.2s ease-out;-moz-transition:all 0.2s ease-out;-o-transition:all 0.2s ease-out;-ms-transition:all 0.2s ease-out}.tp-caption a:hover{color:#ffa902}.tp-caption a{color:#ff7302;text-shadow:none;-webkit- transition:all 0.2s ease-out;-moz-transition:all 0.2s ease-outSo the opening tag for this block has the ‘rs-plugin-settings’ in it, which shows us that its being generated by Revolution Slider: