var __SUPPORTS_TIMING_API = typeof performance === 'object' && !!performance.mark && !! performance.measure && !!performance.getEntriesByType;
function __perfMark(name) { __SUPPORTS_TIMING_API && performance.mark(name); };
var __firstLoaded = false;
function __markFirstPostVisible() {
if (__firstLoaded) { return; }
__firstLoaded = true;
__perfMark("first_post_title_image_loaded");
}
__perfMark('head_tag_start');