Fast HTTP/3 protocols and technical website audit

Technical glitches and slow loading speed are the main hidden reasons for draining ad budgets and losing free search traffic.

For pay-per-click advertising (Yandex Direct, Google Ads): Every second of delay increases the bounce rate by 15–20%. If a website takes longer than 3 seconds to load, up to 40% of users will close the tab without waiting for the first render: you will pay for the click, but won't even get a chance at conversion. In addition, advertising algorithms evaluate the Landing Page Experience. Slow and glitchy resources suffer a lower quality rating, which automatically increases cost per click (CPC) by 50–150% to maintain positions. If the server crashes (502/504 errors) during active campaigns, you are literally burning money on clicks to broken pages.

For search engine optimization (SEO): Core Web Vitals speed metrics are official ranking factors for Yandex and Google. Poor user behavior factors (when users return to search due to slow loading) signal to search engines that the resource is low quality, which tanks rankings for key search queries. In addition, if crawling robots encounter server timeouts and crashes during scanning, they reduce the website's crawl budget and drop unavailable pages from the search index.

We evaluate site speed in two directions: lab tests and real user experience (Field Data based on Chrome User Experience Report - CrUX reports). We measure key Core Web Vitals metrics: LCP (Largest Contentful Paint), INP (Interaction to Next Paint), and CLS (Cumulative Layout Shift).

The analysis is conducted under simulated slow mobile internet (Mobile throttling). We thoroughly investigate the Critical Rendering Path: identify render-blocking CSS and JS files, check DOM tree size, presence of unused code, font optimization (eliminating FOIT/FOUT text flashes), correct lazy-loading of media files, and resource compression efficiency using the modern Brotli algorithm.

Outdated software is the main cause of slow performance and web resource hacks. As part of the audit, we thoroughly check the relevance of the PHP interpreter version (upgrading to PHP 8.2/8.3 gives up to 30% backend performance gain compared to outdated PHP 7.4), web server versions (Nginx/Apache), DBMS (MySQL/PostgreSQL), as well as CMS cores (WordPress, Bitrix, OpenCart, etc.) and installed modules.

Using outdated software is fraught with critical feature incompatibilities, RAM memory leaks, slow query parsing, and the presence of known public vulnerabilities (CVE), through which attackers can easily gain access to the website and database.

Security is audited through a comprehensive scan of the file structure and databases. We search for hidden backdoors, web shells through which hackers control the site, malicious JavaScript injections stealing customer card data or generating spam banners, hidden redirects to third-party resources, and spam mailers.

We also check the correctness of file and folder access permissions (for example, 777 permissions on critical folders allow any script to overwrite configuration files), vulnerabilities to SQL-injection and Cross-Site Scripting (XSS) attacks, proper SSL certificate configuration (encryption, TLS 1.3 support), and administrative panel security against password brute-forcing (Brute-Force).

Failures often occur due to sub-optimal server resource allocation and inefficient code. We perform a deep analysis of web server error logs (Nginx error.log, PHP error_log) and slow SQL queries (Slow Query Log) that create bottlenecks and overload the CPU. We check the configuration of PHP-FPM process pools, memory limits (memory_limit), and script execution time (max_execution_time).

The audit allows early detection of resource leaks, missing required database indexes (causing table locks), and improperly configured caching (Redis, Memcached, OPcache). Based on this data, we provide recommendations that will save your website from «502/504 Bad Gateway crashes» during peak traffic periods (sales, ad campaigns, or DDoS attacks).

Access is not required for a basic technical audit. We perform an external non-destructive scan: evaluate load speed and Core Web Vitals parameters, analyze server response headers, SSL certificate configuration, DNS records, and find layout errors and external integrations (analytics scripts and widgets) that slow down performance.

However, for a full deep audit (checking source code for viruses, analyzing slow database queries, auditing Nginx/PHP configuration files, investigating server error logs), we will need guest access to the hosting panel, FTP/SSH, and the CMS system. All transmitted data is confidential and protected by a strict NDA agreement.