laravel check if theres difference before saving model code example

Example 1: laravel model is dirty

if($product->isDirty()){
    // changes have been made
}

Example 2: laravel update only changed fields

protected function performUpdate(Builder $query, array $options = [])
{
    $dirty = $this->getDirty();

    if (count($dirty) > 0)
    {
        // runs update query
    }

    return true;
}