If you are minifying scripts and css files using a caching plugin or using FastCGI cache then you might need to warmup your blog after purging your cache. This is a simple warm up cli script for WordPress to initiate cache or HHVM HHBC and making sure all pages/posts do not have errors. Additionally the script creates a urllist.txt file that you…

warmup.php

<?php

if (PHP_SAPI != 'cli') {
    header('Status: 403 Forbidden');
    header('HTTP/1.1 403 Forbidden', true, 403);
    exit();
}


$_SERVER['REMOTE_ADDR'] = '127.0.0.1';
define('BASE_PATH', "");
define('WP_USE_THEMES', false);
global $wp, $wp_query, $wp_the_query, $wp_rewrite, $wp_did_header;
require(BASE_PATH . 'wp-load.php');

//Disable cache
ob_end_clean();

$homeUrl = home_url() . "/";
$urlList = [$homeUrl];


$the_query = new WP_Query(['post_type' => 'any', 'post_status' => 'publish']);
//add homepage pages
warmup_pages_links($the_query->max_num_pages, $homeUrl);

//get all posts
$the_query = new WP_Query(['post_type' => 'any', 'posts_per_page' => '-1', 'post_status' => 'publish']);
$the_query->the_post();
while ($the_query->have_posts()) {
    $urlList[] = get_permalink();
    $the_query->the_post();
}

$categories = get_categories();
foreach ($categories as $category) {
    $catUrl = get_category_link($category->term_id);
    $urlList[] = $catUrl;
    $the_query = new WP_Query(['cat' => $category->term_id]);
    warmup_pages_links($the_query->max_num_pages, $catUrl);
}

$tags = get_tags();
foreach ($tags as $tag) {
    $tagUrl = get_tag_link($tag->term_id);
    $urlList[] = $tagUrl;
    $the_query = new WP_Query(['tag_id' => $tag->term_id]);
    warmup_pages_links($the_query->max_num_pages, $tagUrl);
}

$authors = get_users(array('who' => 'authors'));
foreach ($authors as $author) {
    $authorUrl = get_author_posts_url(false, $author->user_nicename);
    $urlList[] = $authorUrl;
    $the_query = new WP_Query(['author_id' => $author->term_id]);
    warmup_pages_links($the_query->max_num_pages, $authorUrl);
}

//test search page
$urlList[] = get_search_link('bala la lam');

file_put_contents('urllist.txt', implode("\n", $urlList));

echo "Found " . count($urlList) . " URLS and saved to urlList.txt \n";
echo "Testing URLs \n";
foreach ($urlList as $url) {
    warmup_getUrl($url);
}
echo "\nWarmup done \n";

function warmup_getUrl($url)
{
    if ($contents = wp_remote_get($url, ['timeout' => 15])) {
        if (is_wp_error($contents) || (isset($contents['response']['code']) && $contents['response']['code'] != 200)) {
            $subject = "[WP " . get_bloginfo('name') . "] Error on {$url} ";
            $error = is_wp_error($contents) ? $contents->get_error_message() : print_r($contents, true);
            wp_mail(get_bloginfo('admin_email'), $subject, $error);
            die("\n{$subject} :" . $error);
        }
        echo ".";
    }
    return $contents;
}

function warmup_pages_links($total, $url)
{
    for ($i = 2; $i <= $total; $i++) {
        $GLOBALS['urlList'][] = "{$url}page/{$i}/";
    }
}

// siege -c200 -d1 -r30 -f urllist.txt