WebSpeed
Speed auditeff.org
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eff.org loads faster with WebSpeed

Measured PageSpeed before and after WebSpeed optimization — no plugins, no migration.

Mobile · PageSpeed
57
→
84
+27
Desktop · PageSpeed
86
→
99
+13
Screen filledNowWebSpeedSpeedup
Mobile8.3 s3.1 s2.7×
Desktop1.4 s0.6 s2.5×
Get the reportSpeed up my site →
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Load recording under mobile throttling: original left, WebSpeed Fast right.

Your gains with WebSpeed Fast
2.7×
Speed Index 8.3 s → 3.1 s · mobile
Visually faster
4.4×
3 MB → 712 KB
Lighter page
−77%
≈ 1.5 → 0.35 g/visit
CO₂ per visit
up to40%
−58% LCP
Google traffic (SEO)*
+21%
−4.3 s LCP × ≈5%/s
Conversion rate**
−20%
−4.3 s LCP × ≈8%/s
Bounce rate***
Beyond the score
Stays up during outages
Cached delivery serves the last good version if your origin fails.
Absorbs traffic peaks
The proxy cache serves ready pages, so spikes don’t topple the origin.
Lighter on your hosting
Fewer origin hits and less third-party code on the critical path.
Lower CO₂ per visit
A lighter page transfers fewer bytes and burns less energy.

*Core Web Vitals are a Google ranking signal, but work as a “tiebreaker” — they matter most when two pages are roughly equal in relevance and content. The biggest SEO benefit comes from moving out of the Poor zone (score < 50).

**Google / Deloitte (2019): 0.1 s improvement → +8% conversions in retail. Portent: each extra second of load time reduces conversion rate ~4%.

***Based on Google data: pages loading in 3 s vs 1 s show ~32% higher bounce rate. Estimate scales proportionally to LCP improvement and is site-specific.

Speed metrics
MetricMobileDesktop
NowFastNowFast
FCPtarget ≤ 1.8s8.3 s1.8 s−78%1.4 s0.4 s−72%
LCPtarget ≤ 2.5s11.8 s4.2 s−64%1.9 s0.9 s−52%
TBTtarget ≤ 200ms10 ms0 ms−100%0 ms10 ms
CLStarget ≤ 0.1000.0040.005+27%
Speed Indextarget ≤ 3.4s8.3 s3.1 s−63%1.4 s0.6 s−60%
TTItarget ≤ 3.8s11.8 s4.2 s−64%1.9 s0.9 s−52%
PageSpeed score5784+278699+13
What WebSpeed optimized · 18 changes
7 Resource hints6 JavaScript3 CSS delivery1 Fonts1 Rendering✓ Server headers tuned✓ Errors handled gracefully

PageSpeed scores are measured by Google PageSpeed Insights and are not guaranteed: they vary run to run and depend on network, device and third-party code.

FAQ
How do we measure?
We test each configuration of your site — the original and with our optimizations — 2–3 times for mobile and desktop, and take the median rather than a single run, which filters out random spikes.
Why does my PageSpeed show different numbers?
We use Google Lighthouse — the same engine behind PageSpeed Insights. Differences come from the test server location, CDN cache state and Lighthouse version. Compare columns with each other here: the relative improvement is what matters.
Does speed affect Google rankings?
Core Web Vitals are a ranking factor since May 2021, but Google calls them a tiebreaker. The clearest gain is moving out of the Poor zone (score < 50); if you are already Good, further speed still cuts bounce and lifts conversion.
Pricing

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The before/after check is free and not one of these plans. Choose a plan when you are ready to make the speed-up permanent: a one-time report, the automatic Fast pipeline, or a hand-tuned setup.

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  • Proxy or on-site SDK, no code changes
  • Cached delivery keeps your site up during origin outages
  • Priced by monthly visits, scales with you
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