My WordPress site loads really slow. Any ideas as to why?

It’s bizarre. When I rerun the speed test, it seems the browser waits ~5 seconds to connect. Not the videos, not images, not javascript. Maybe the domain?

If you use firefox, maybe download the YSlow plugin to analyse what is taking so long…

simple cache implementation

function fb_comment_count() {

$exptime = 900; // 1h = 3600s
$file = 'fbcc_cache.txt'; //cache file

    global $post;
    $url = get_permalink($post->ID);

if (!file_exists($file) || filesize($file)==0 || ((time()-filemtime($file)) > $exptime)) {
 $filecontent = file_get_contents('https://graph.facebook.com/?ids=' . $url);
 file_put_contents($file, $filecontent, LOCK_EX);
}
else $filecontent = file_get_contents($file);

    $json = json_decode($filecontent);
    $count = $json->$url->comments;
    if ($count == 0 || !isset($count)) {
        $count = 0;
    }
    echo $count;
}

..ah, sorry. Single file, multiple pages :-p
You must create cache folder and try something that:

function fb_comment_count() {
    global $post;
    $url = get_permalink($post->ID);

$exptime = 900; // 1h = 3600s
$file = 'cache/fbcc_'.$post->ID.'.txt'; //cache file

if (!file_exists($file) || filesize($file)==0 || ((time()-filemtime($file)) > $exptime)) {
 $filecontent = file_get_contents('https://graph.facebook.com/?ids=' . $url);
 file_put_contents($file, $filecontent, LOCK_EX);
}
else $filecontent = file_get_contents($file);

    $json = json_decode($filecontent);
    $count = $json->$url->comments;
    if ($count == 0 || !isset($count)) {
        $count = 0;
    }
    echo $count;
}