Website performance and Core Web Vitals optimization
I improve loading performance, visual stability and responsiveness to user interactions. I work with WordPress and WooCommerce, Shopify, Wix and Velo, OpenCart, Tilda, custom HTML, CSS and JavaScript websites, as well as projects built with React, Next.js, Nuxt and other technologies. Optimization begins with a technical audit and takes the website’s design, functionality and platform limitations into account.
Complete performance optimization
What the service includes
From measuring current performance and identifying bottlenecks to optimizing resources, caching and server behaviour, followed by testing of the website’s most important pages.
Audit and diagnostics
- Analysis using PageSpeed Insights, Lighthouse, Search Console and browser developer tools.
- Identification of issues affecting LCP, INP, CLS, server response time and initial rendering performance.
- Review of hosting, themes, plugins, applications, third-party scripts, analytics and advertising services.
Resource optimization
- Image compression, modern formats, responsive dimensions, lazy loading and prioritization of important media assets.
- Optimization of local and external fonts, their loading strategy and their impact on layout shifts.
- Reduction of unused CSS and JavaScript, deferred loading of non-critical scripts and less main-thread blocking.
Caching and validation
- Configuration of browser, page and object caching, CDN delivery, compression and resource loading policies.
- Optimization of databases, server requests, technical dependencies and unnecessary CMS overhead.
- Retesting of mobile and desktop versions, forms, carts, integrations and key user journeys.
Who it is for
Who this service is for
Slow websites on any platform
For CMS, website-builder and custom-code projects that load slowly, feel unresponsive or perform poorly on mobile devices.
Online stores and commercial websites
For projects where slow product pages, catalogues, carts or forms create unnecessary barriers before an enquiry or purchase.
Websites after redesign or expansion
For websites that became slower after adding new pages, animations, plugins, applications, integrations or third-party marketing tools.
Frequently asked questions
Answers about website speed optimization
Key information about supported platforms, PageSpeed, Core Web Vitals, safe implementation, timelines and the correct interpretation of results.
Performance optimization is available for WordPress and WooCommerce, Shopify, Wix and Velo, OpenCart, Tilda, custom HTML, CSS and JavaScript websites, as well as React, Next.js, Nuxt and other projects. The available methods depend on the platform: custom code provides access to almost every loading layer, while hosted website builders keep some server and system settings under platform control.
Guaranteeing a specific score before an audit would not be reliable. Results depend on the platform, hosting, theme, content volume, analytics, advertising scripts, chat widgets, videos and other third-party services. Lighthouse also runs a laboratory test under simulated conditions, so its score can vary between tests. The goal is to remove genuine performance bottlenecks and achieve the best stable result without sacrificing required functionality.
Core Web Vitals describe real user experience: LCP measures how quickly the main content appears, INP measures responsiveness to interactions, and CLS measures visual stability. Good target values are LCP within 2.5 seconds, INP within 200 milliseconds and CLS of 0.1 or less. Google considers page experience, but strong technical metrics do not replace useful content, relevance, links and other SEO factors.
Aggressive file combination, delaying critical scripts or incorrect caching rules can cause compatibility issues. Changes are therefore introduced gradually, with a backup or rollback option available. After each stage, important functionality is tested, including menus, forms, carts, payments, filters, language versions, mobile layouts and connected services.
The timeline depends on the size of the website, platform, code quality, hosting and number of third-party services. Individual issues can often be resolved within several working days, while comprehensive optimization of a large store or custom project requires more time. Laboratory PageSpeed results change immediately, but Search Console field data is collected over a rolling 28-day period, so real-user reports improve gradually.