A pretty inefficient bug in the roadfightertheme WP theme means the cropped image is recreated every page load. The following is a quick patch to stop the bug just before it writes. A better fix would be higher up the stack, that’ll come later. For now, here’s the patch:

/public_html/wp-content/themes/roadfightertheme/functions/dynamic-image.php
line 276

change
$image_detail = $img->save($filename);

to
if (!file_exists($filename))
$image_detail = $img->save($filename);
else
$image_detail = array ("path" => $filename, "file" => "image.jpg", "width" => $width, height => $height, "mime-type" => "image/jpeg");
}