Web & Digital Experience · Service 14 of 17

Web Performance Optimization faster pages, measured before and after

O Clock Software, headquartered in Chennai, India, finds and fixes what makes websites and web apps slow: heavy images, render-blocking code, slow servers, third-party scripts and layout shifts. Every fix is measured against Core Web Vitals, so you see exactly what improved.

Discuss your project → What we build
  • 2009Founded in Chennai
  • 1,000+Projects delivered
  • 12+Countries served
  • 100+Engineers in-house
  • 4.6★Google rating · 59 reviews

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What we build

Web Performance Optimization: what we build

Core Web Vitals, load time and server response improvements. Here are the six kinds of web performance optimization work we are asked for most often.

Where speed is lost

The six most common causes of a slow site

Almost every slow site we audit suffers from some mix of these. Each one hurts a specific Core Web Vital, which tells us where to start.

Bottleneck Metric it hurts most Typical fix
Large, unoptimised images Largest Contentful Paint Modern formats, responsive sizes, priority hints
Render-blocking CSS and JavaScript Largest Contentful Paint Critical CSS, deferred scripts, code splitting
Slow server response Largest Contentful Paint Caching, CDN, faster queries and hosting
Heavy third-party scripts Interaction to Next Paint Remove, delay or load them asynchronously
Long JavaScript tasks Interaction to Next Paint Break up work, reduce framework overhead
Late-loading fonts, ads and embeds Cumulative Layout Shift Reserve space, preload fonts, size embeds

How we deliver

How we deliver Web Performance Optimization

  1. 01

    Measure

    Field data from real users plus lab tests.

  2. 02

    Diagnose

    Find the causes behind each slow metric.

  3. 03

    Prioritise

    Fixes ranked by impact and effort.

  4. 04

    Fix

    Changes made and tested on staging.

  5. 05

    Verify and monitor

    Before and after results, then ongoing monitoring.

Technology

Technology for Web Performance Optimization

Chosen per project for fit, maintainability and your team's skills.

Measurement

  • PageSpeed Insights
  • Chrome UX Report
  • Lighthouse
  • WebPageTest

Monitoring

  • Google Search Console
  • Real-user monitoring
  • GTmetrix

Fixes

  • Image CDNs
  • Code splitting
  • Edge caching
  • Server-side rendering

Platforms

  • WordPress
  • Shopify
  • Next.js
  • Magento
  • Custom apps

Straight answers

Is Web Performance Optimization right for you?

We would rather recommend less than sell you more. Here is how we judge it.

A good fit when

  • Pages feel slow, especially on mobile
  • Search Console reports poor Core Web Vitals
  • Users drop off before pages finish loading
  • A redesign is planned and speed must improve

  • The site is already fast for real users

    If field data is good, effort is better spent on content or features.

  • The slowness is in the database or API

    That needs backend work; see Backend Development or Database Development.

  • You expect speed alone to lift rankings

    Speed helps, but content and relevance matter more for rankings.

Use cases by industry

Web Performance Optimization by industry

The same capability, shaped by the data, rules and users of each sector.

Related services

Often combined with Web Performance Optimization

Prefer engineers in your own team?

The full service area

FAQ

Web Performance Optimization FAQ

What are Core Web Vitals?

Core Web Vitals are Google's three user-experience metrics: Largest Contentful Paint measures loading, Interaction to Next Paint measures responsiveness and Cumulative Layout Shift measures visual stability. Good thresholds are 2.5 seconds or less, 200 milliseconds or less and 0.1 or less.

Does page speed affect Google rankings?

Yes, as one of many signals. Core Web Vitals are part of Google's page experience signals, but relevance and content quality matter more; speed mainly helps by keeping visitors engaged.

Why does PageSpeed Insights show different scores each time?

Lab tests vary with network and server conditions. We rely on field data from real users, which Google uses for Core Web Vitals, and use lab tests to diagnose specific problems.

Can you speed up a WordPress or Shopify site?

Yes. Common gains come from removing unused plugins or apps, optimising images, deferring scripts, improving theme code and adding caching and a CDN.

How long before Core Web Vitals improve in Search Console?

Search Console reports a 28-day rolling window of real-user data, so improvements show gradually over about four weeks after fixes go live.

Is web performance optimization a one-off job?

The first round is a project, but new content, features and scripts can slow a site again. We recommend ongoing monitoring with alerts when metrics slip.

More Web & Digital Experience services

Other Web & Digital Experience services

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