My most recent writing on sustainable web development, performance tips for websites and apps, as well as a few other musings.

Blue car driving through the desert with colourful balloons hanging out the window.

Driven by defaults

I’ve been thinking about how we can drive broader change to make the web more sustainable and performant. As I’ll get into, I believe a large part of that comes from the defaults set by the tools and services we use.

COP27 Egypt: A webpage sustainability review

As COP27 approaches, I thought it would be “fun” to take a look at this year’s COP homepage. How does it do in terms of website sustainability?

Website carbon: Beyond data transfer

Measuring the carbon emissions of websites and apps is no easy thing. Most tools use the amount of data being transferred to calculate the overall emissions. But to get more detailed, relevant results we need to go beyond just data transfer.

Release guide: CO2.js v0.11

The v0.11.0 release of CO2.js introduces a change to the default carbon estimation model, as well as including global average and marginal intensity data for the first time.

CO2.js: An Open Library for Digital Carbon Reporting

Uploading and downloading the bits and bytes that make up the internet uses a lot of electricity. Breaking the internet down to a systems level, data transfer over networks accounts for an estimated 14% of the web’s total electricity consumption.

Release guide: CO2.js v0.10

The v0.10.0 release of CO2.js introduces an easier way for developers to switch between the different carbon estimation models that are available in the library.

Green summer trees overhead with blue sky

A carbon aware internet

Knowing the carbon intensity of the electricity grids in which code runs can allow developers to make informed decisions about where/when to run their code.

Screenshot of the Performance Insights site.

Testing a page with Performance Insights

Performance Insights is a tool by Builder.io (http://builder.io/) which, in their words, allows you to learn what improvements can have the greatest impact on your site's performance.