Every second your website takes to load costs you money. A 1-second delay in page load reduces conversions by 7%. A site that takes 5 seconds to load loses nearly half its visitors before they see a single word. If you are spending money driving traffic to a slow website, you are filling a leaky bucket.
Most website performance optimization follows a clear priority order. The fixes below are ranked by impact, but knowing which ones matter for *your* site requires measurement first. Or better yet, run our free website audit first to see exactly where your site is bleeding speed.
Measure Before You Fix
Do not guess what is slow. Core Web Vitals are the three metrics Google uses to evaluate user experience:
- LCP (Largest Contentful Paint): Time until main content is visible. Target: under 2.5 seconds.
- INP (Interaction to Next Paint): Time until the page responds to input. Target: under 200ms.
- CLS (Cumulative Layout Shift): How much the layout jumps during load. Target: under 0.1.
Use Google's PageSpeed Insights, Lighthouse, or our free website audit tool to get a baseline. Write down your scores.
Optimize Your Images
Unoptimized images are the number one performance killer on the web. The average page ships 2-3 MB of images. Most of that is waste.
- Convert to WebP or AVIF. 25-50% smaller than JPEG/PNG with no visible quality loss.
- Lazy load below the fold images. Add `loading="lazy"` to any image not visible on initial load.
- Use responsive `srcset`. Serve 400px images to mobile, 1200px to desktop.
- Serve from a CDN. Users download from the nearest server worldwide.
Image optimization alone can cut total page weight by 40-60% and drop LCP by 1-2 seconds.
Cut JavaScript Bloat
After images, JavaScript is the heaviest thing on most websites, and it blocks rendering.
- Render blocking scripts in ``. Move scripts to bottom of `
` or add `defer`/`async`. This alone can save 500ms-2 seconds.- Unused code. Run bundle analysis. Most sites ship 40-60% more JavaScript than they use.
- Code splitting. Each page should load only the JavaScript it needs. Modern frameworks like Next.js handle this automatically, we covered this in our tech stack guide.
- Third party scripts. Analytics, chat widgets, ad pixels, each adds 50-200KB. A site with 15 third party scripts can spend 3-4 seconds just loading trackers.
Improve Server Response Time (TTFB)
If your server takes over 800ms to respond, nothing else on this list will save you.
- Use a CDN for static pages. Cached pages serve in 20-50ms instead of 800ms from origin.
- Enable server side rendering or static generation. Pre render pages at build time.
- Optimize database queries. Slow queries are the most common cause of slow TTFB.
- Upgrade from shared hosting. A $5/month shared plan means sharing resources with hundreds of sites.
For sites where infrastructure and performance are critical, proper TTFB optimization often requires CDN configuration and caching strategy, but the payoff is enormous.
Fix Font Loading
Custom fonts cause FOIT (Flash of Invisible Text), the page appears blank for 1-3 seconds while fonts download.
- Add `font-display: swap` to your `@font-face` rules. Shows fallback font immediately.
- Preload critical fonts. Start downloading before CSS is parsed.
- Limit font weights. Most sites only need regular and bold. Each weight is a separate download.
- Use `woff2` format. 30% smaller than woff, supported everywhere.
Eliminate Layout Shifts
Layout shifts destroy user trust and tank your CLS score.
- Images without dimensions. Always set `width` and `height` attributes or use CSS `aspect-ratio`.
- Dynamically injected content. Ad banners and cookie bars push content down. Reserve fixed space.
- Web fonts causing reflow. Use `font-display: swap` with a size matched fallback.
Enable Compression and HTTP/2
Two server level changes that take 10 minutes:
- Gzip or Brotli compression reduces file sizes by 60-80% during transfer.
- HTTP/2 allows downloading multiple files simultaneously over a single connection.
The WordPress Problem
WordPress sites suffer disproportionately from plugin bloat, unoptimized themes, and shared hosting. A fresh WordPress install is fast. A site with 30 plugins, a page builder theme, and $8/month hosting takes 6-10 seconds to load.
Each plugin adds database queries, CSS, and JavaScript. The cumulative effect is dozens of unnecessary requests per page load. We wrote a detailed comparison of custom websites vs WordPress covering the performance gap.
Quick Wins Checklist
Do these five things today:
- Run a speed test,our free website audit or PageSpeed Insights. Write down scores.
- Convert your three largest images to WebP and add `loading="lazy"`
- Add `defer` to all non critical scripts in your `
`- Add `font-display: swap` to your font declarations
- Check your TTFB, if it is over 800ms, hosting is the bottleneck
These changes can improve load time by 30-50% in under an hour.
Stop Guessing, Start Measuring
A slow website is a revenue problem disguised as a technical one. Not sure where to start? Run our free website audit for a detailed performance breakdown with specific recommendations.
If your site needs more than quick fixes, infrastructure changes, a hosting migration, or a performance overhaul,talk to our team →