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Simon Hearne

Web Performance Consultant at NCC Group

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Recent Posts

Blocking requests in webpagetest? Don't use Chrome.

We know that third-party content can harm the user experience on a website. Measuring that impact can be tricky.

How fast is fast enough?

Do you know when your website’s speed starts to impact your customers’ behaviour?

Getting Reliable Visual Performance Metrics

Visual metrics such as Speed Index, render start and visual complete are the best proxies we have for user experience. Unfortunately two of these are totally thrown by rotating carousels, popups, cookie banners and adverts.

Render Conf 2016 - Day 1

Render Conference - previously known as jQuery UK - was held in Oxford last week. It’s a front-end conference for front-end people, which makes me a bit of an outsider. Performance is not the focus of Render Conference.

Prioritising Site Speed Recommendations

Sometimes prioritising recommendations is more important than making them.

Velocity Europe 2015 - The Good Ones!

This post is a review and summary of the talks at Velocity Europe that I attended. I’ve summarised each talk and given links to the slides, videos and ratings.

Velocity Europe 2015 - My Allstars

This post is a review and summary of the talks at Velocity Europe that got a 5 star review from me. I’ve summarised each talk and given links to the slides, videos and ratings.

Measuring Webpage Jank

Webpage jank can harm the user experience, here’s an easy way to measure it on your pages

Be Mindful With Modernizr

Modernizr might be making your site slow, especially on mobiles

The Future of Web Performance - Part 1

Web performance is critically important, how will upcoming technologies change the way we manage it?