public function processChanges()
{
set_time_limit(6000);
$webpageIds = Webpage::all()->lists('id');
foreach ($webpageIds as $webpageId) {
echo Webpage::find($webpageId)->url . '<br/>';
exit;
$snapshots = Snapshot::whereWebpageId($webpageId)->get();
foreach ($snapshots as $snapshot) {
$snapshot->processChange();
}
}
}
