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php - How to optimize save to csv file over 700k rows - Laravel

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I need to write over 700k lines to the csv file. The task should last less than 30 seconds, but it works 70 seconds. How can I optimize this process?

$users = User::all();        

    $callback = function () use ($users) {
        $fh = fopen('php://output', 'w');
        fputs($fh, "\xEF\xBB\xBF");

        foreach ($users as $user) {

            if ($user->writer) {
                $books = $user->books;
                foreach ($books as $book) {
                    fputcsv($fh, Arr::prepend($data, $book['name']), ';');
                }
            }
        }
    };
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2021-12-1

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2021-12-1

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