Create a WP test site with lots of users and posts

<?php
WP_CLI::add_command( 'data create', 'create_test_data' );

function ppc_create_test_data() {
        $user_n = 1000;
        $posts_per_user = 50;

        while( $user_n &gt; 0 ) {
        $user_id = wp_create_user( $user_n, 'password' );
        if( ! is_wp_error( $user_id ) )
            WP_CLI::line( "Created user ".$user_id );

        for( $n = $posts_per_user; $n &gt; 0; $n-- ) {
            $post_id = wp_insert_post( array(
                'post_author' =&gt; $user_id,
                'post_date' =&gt; date( 'Y-m-d H:i:s', mt_rand(1663027200, 1669852799) ),
                'post_content' =&gt; lorem(500),
                'post_title' =&gt; $n,
            ) );
            if( ! is_wp_error( $post_id ) )
                WP_CLI::line( "Created post ".$post_id );
        }
        --$user_n;
    }
}

function lorem($count = 1, $max = 20, $standard = true) {
    // https://stackoverflow.com/questions/20633310/how-to-get-random-text-from-lorem-ipsum-in-php
    $output = '';

    if ($standard) {
        $output = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, ' .
            'sed do eiusmod tempor incididunt ut labore et dolore magna ' .
            'aliqua.';
    }

    $pool = explode(
        ' ',
        'a ab ad accusamus adipisci alias aliquam amet animi aperiam ' .
        'architecto asperiores aspernatur assumenda at atque aut beatae ' .
        'blanditiis cillum commodi consequatur corporis corrupti culpa ' .
        'cum cupiditate debitis delectus deleniti deserunt dicta ' .
        'dignissimos distinctio dolor ducimus duis ea eaque earum eius ' .
        'eligendi enim eos error esse est eum eveniet ex excepteur ' .
        'exercitationem expedita explicabo facere facilis fugiat harum ' .
        'hic id illum impedit in incidunt ipsa iste itaque iure iusto ' .
        'laborum laudantium libero magnam maiores maxime minim minus ' .
        'modi molestiae mollitia nam natus necessitatibus nemo neque ' .
        'nesciunt nihil nisi nobis non nostrum nulla numquam occaecati ' .
        'odio officia omnis optio pariatur perferendis perspiciatis ' .
        'placeat porro possimus praesentium proident quae quia quibus ' .
        'quo ratione recusandae reiciendis rem repellat reprehenderit ' .
        'repudiandae rerum saepe sapiente sequi similique sint soluta ' .
        'suscipit tempora tenetur totam ut ullam unde vel veniam vero ' .
        'vitae voluptas'
    );

    $max = ($max &lt;= 3) ? 4 : $max;
    $count = ($count &lt; 1) ? 1 : (($count &gt; 2147483646) ? 2147483646 : $count);

    for ($i = 0, $add = ($count - (int) $standard); $i &lt; $add; $i++) {
        shuffle($pool);
        $words = array_slice($pool, 0, mt_rand(3, $max));
        $output .= ((! $standard &amp;&amp; $i === 0) ? '' : ' ') . ucfirst(implode(' ', $words)) . '.';
    }

    return $output;
}
?>