Tackling tech debt head-on with Clearly

Tackling tech debt head-on with Clearly


Losing sight of the lead

Online eyewear is a hyper-competitive market. Brands fight hard to out-spend each other for ad space, climb to the top of organic rankings, and earn their customers’ loyalty. Clearly had noticed they were having web performance issues and knew they needed to take action, but were handcuffed by the amount of tech debt in their stack. They needed an external partner to provide the oversight and collaboration needed to ensure everything was done right, and that the impact of any changes could be measured before launch.


Keeping eyes on the prize

Any mature digital business has a staging site to preview code or content changes before deploying to live customer traffic. Monitoring the speed of this site can help validate performance improvements before releasing code into the wild. For Clearly, this was particularly challenging because their staging site is not publicly accessible–it can only be reached through a private VPN. Other performance monitoring tools were unable to help.

We collaborated with Clearly to add the ability for their continuous integration test servers to post Lighthouse test results to our site speed monitoring API. That way, they could monitor the speed changes, compare to the live website, and ensure that code fixes were having the desired impact.

Many of the performance issues uncovered were recurring patterns,  spread across hundreds of pages. We identified each opportunity, and helped the developers codify them into reusable, high-performance, CMS components. We then worked with the content management team to migrate custom code into reusable components, making the website drastically more maintainable, as well as more performant.


Taking back tech debt

With our help, Clearly set off with a ranked performance backlog so they could continue to optimize the site even after we were gone. This backlog consisted of both code changes to be made and content that needed to be optimized in the Content Management System. We coached their developers on how to make these changes and also helped get their Core Web Vitals up to speed.


Looking good:


Faster Largest Contentful Paint (LCP)


Lower Cumulative Layout Shift (CLS)


Passing Core Web Vitals

“SpeedSense directed our team to the metrics that matter most… and helped us narrow down the dozens of metrics to the three that are most important to the user experience.”

Michael Kirby
Manager - Web Experience, Clearly

Clearly is a multinational online retailer of prescription eyeglasses and contact lenses. They were the first company to sell eyewear online. They've been a top online retailer for over twenty years, and they've grown their business by understanding the needs of their customers and providing exceptional customer service experiences.


Eyeglasses and contact lenses


$46.3 million in global ecommerce sales

20+ years of ecommerce experience


Get what they got:

Site Speed Audit

Know where you stand and where you need to be. Our website audit will give you an in-depth look at your competition, your website's performance, and specific recommendations for improvement.

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90-Day Site Speed Sprint

Get three months of consulting, tracking, monitoring, and road mapping, so you can take control of your backlog and improve site speed performance.

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ROI Modeling

Having trouble making a business case for site speed? Does investing in site speed feel like a leap of faith? Use your own user data to model the potential ROI of website performance improvements.

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Sensai Web Performance Monitoring

Stay on top of your website's performance with our site speed monitoring platform. Integrate your analytics to correlate customer behavior and catch performance problems before your users do.

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