We Tested 3,721 Tree Service Websites — Here's What's Actually Making Them Slow

In our last study, we tested nearly 4,000 tree service websites and found that only 6% pass Google's mobile performance threshold. The scores told us the industry has a problem. But they didn't tell us why.

So we went deeper. We pulled full Lighthouse audits on 3,721 tree service websites — measuring not just scores, but load timing breakdowns, resource sizes, script counts, and every phase of how a page actually renders on a phone. The goal was simple: find out what's making these sites slow and whether the fixes are as obvious as most people assume.

The Numbers at a Glance

Largest Contentful Paint (LCP) — how long it takes for the main content on the page to become visible — is the metric that matters most for visitor experience. Google considers anything under 2.5 seconds "good."

The Same Site, Two Completely Different Experiences

Here's something that surprises a lot of business owners: the average tree service website loads in 2.1 seconds on desktop but takes 10.7 seconds on mobile — over five times slower. Same website, same content, completely different experience.

Your laptop handles the code fine, but your customers are searching from their phone on a cellular connection with less processing power. What feels instant to you may feel painfully slow to the person actually trying to hire you.

Where 10.7 Seconds Actually Goes

When most people hear "slow website," they think "bad hosting." It makes sense intuitively — if the page is slow, the server must be struggling, right?

We broke the average mobile LCP into four phases — the steps the browser goes through from the moment someone taps your link to the moment they see your page. Here's what we found:

Server Response (TTFB): 855ms — 8% of total time. This is the hosting part. For the vast majority of tree service sites, the server responds quickly. Hosting isn't the bottleneck.

Load Delay: 3.9 seconds — 37% of total time. This is the gap between the server responding and the browser even discovering the main image on the page. Why the delay? Render-blocking JavaScript and CSS. The browser has to download and parse all that code before it even knows the hero image exists.

Image Download: 1.3 seconds — 12% of total time. Once the browser finds the hero image, downloading it takes about a second. Not great, but not the main issue.

Render Delay: 4.5 seconds — 43% of total time. This is the biggest single chunk. The image has downloaded, but the browser still can't show it because JavaScript is hogging the main thread. The page sits there, visually frozen.

80% of total load time is caused by code — not your server, not your images. The typical tree service website has a code bloat problem.

The Evidence: Fast Servers, Slow Sites

To confirm this wasn't a fluke, we looked at how many sites have a fast server response but still deliver a poor experience. The answer: 48% of tree service websites have good server response times but still fail the LCP threshold. Their hosting is doing its job. The code piled on top of it is not.

The typical site loads 34 separate scripts. Each one adds weight and processing time. Even worse, the average site ships 402 KB of JavaScript that never executes — code that downloads, takes up bandwidth, and blocks rendering, but doesn't actually do anything for the visitor.

What's Actually Making Pages Heavy

The average tree service website weighs 4.3 MB. Over 22% of sites are loading more than 5 MB on mobile, and 8.4% exceed 10 MB — that's an enormous amount of data to push through a cellular connection.

Where does that weight come from? Third-party code is the single biggest contributor, accounting for over half of total page weight on average. These are external scripts your site loads from other companies — Google Tag Manager, Facebook pixels, live chat services, review platforms. Each one seems small on its own, but collectively they dominate the page.

Images are the second largest contributor, but here's the thing: images are usually the content your visitors came for. Before-and-after shots, crew photos, equipment in action — that's valuable. The third-party scripts running in the background? Your visitors never see those. They just feel the slowness they cause.

The Real Problem: Themes and Page Builders

If you're running a WordPress site with a multipurpose theme and a visual page builder — and statistically, there's a good chance you are — your site is almost certainly carrying significant code weight that has nothing to do with what's on the page.

These themes are designed to do everything: sliders, animations, parallax effects, custom layouts, dynamic modules. But every feature the theme could display has to be loaded whether you use it or not. Layer on a page builder plugin, a caching plugin, an SEO plugin, and a handful of widgets — and a page with a headline, a photo, and a phone number ends up loading the same JavaScript bundle as a page with 15 interactive sections.

What This Means for Your Business

At 10.7 seconds, the average tree service website is losing visitors before they ever see the content. They hit back and call the next company in the list — the one whose site loaded in two seconds instead of ten.

The encouraging part of this data is that the problem is fixable. It's not a fundamental limitation of your business or your market. It's code that can be cleaned up, scripts that can be removed or deferred, images that can be properly formatted, and themes that can be replaced with purpose-built alternatives that load only what's needed.

What a Fix Actually Looks Like

Based on the data, the highest-impact changes for the typical tree service website are:

Preload the hero image. Right now, the browser doesn't even know the hero image exists until it finishes processing render-blocking code. A simple preload hint tells the browser to start downloading it immediately, cutting into that 3.9-second Load Delay.

Defer non-critical JavaScript. Most of those 34 scripts don't need to run before the page is visible. Moving them to load after the main content paints eliminates the Render Delay bottleneck.

Audit third-party scripts. That chat widget you added two years ago and forgot about? The social sharing buttons nobody clicks? Each one is contributing to the 55% of page weight that comes from external code. Cut what you don't need.

Serve modern image formats. Converting images to WebP or AVIF can cut image file sizes by 25–50% with no visible quality loss. For a tree service site full of job photos, this adds up quickly.

Consider a lighter foundation. If your site is built on a heavy multipurpose theme, rebuilding on a performance-first architecture may be the most impactful single change.

The Bottom Line

Ten seconds is time your potential customers aren't willing to spend — and it's not a hosting problem you can upgrade your way out of. If your site feels slow on a phone, the data suggests a different diagnosis. We help service businesses build sites that load fast because they're built clean from the ground up, not patched together with plugins and hopes. Book a free consultation and we'll show you exactly what's slowing your site down and what it would take to fix it.

Methodology

This analysis covers 3,721 tree service websites with full Lighthouse audit data, tested via the Google PageSpeed Insights API in April 2026. Each site was measured on both mobile and desktop using Lighthouse's simulated throttling. LCP waterfall phases were extracted from Lighthouse timing data and scaled proportionally to match simulated total LCP. Resource sizes, script counts, and diagnostic metrics are from Lighthouse's network and performance audits. All statistics in this article refer to mobile measurements unless otherwise noted. This study is a follow-up to our initial analysis of 3,829 tree service website PageSpeed scores.