All posts by Damien Jubeau

Lighthouse: a powerful tool included in Chrome and DevTools

After our articles about Test My Site and PageSpeed Insights, our collection dedicated to the Google Speed Update ecosystem continues with another tool: Lighthouse.
Released in 2016 as a Chrome extension, Lighthouse is now also available directly in Chrome DevTools, via the “Audits” tab. Lighthouse is a great resource for developers interested in web performance and quality. Continue reading Lighthouse: a powerful tool included in Chrome and DevTools

PageSpeed Insights: the best tool to check your website performance for the Google Speed Update?

This is the second part of our weekly series about Google toolkit for web performance. A few weeks before the Speed Update (Google algorithm change expected on July 2018) this collection will help you to benefit from the best of the available tools and to avoid tricky mistakes. The tool of the day is perhaps one of the most well-known: Google PageSpeed Insights. Continue reading PageSpeed Insights: the best tool to check your website performance for the Google Speed Update?

User Timing API (Custom Timing): the most relevant performance measure ever

You may already have dreamed of it: being able to measure exactly when one image of your web page is rendered or a particular script is executed, and track this moment through your favorite tools. The User Timing API made it possible, allowing you to place marks wherever you need within your pages! That feature is now supported by all the most recent browsers. And Dareboost is about to let you benefit from it at a larger scale! Continue reading User Timing API (Custom Timing): the most relevant performance measure ever

Web Performance Fundamentals: what is the Speed Index?

At Dareboost, we have a motto: you can’t assess your overall website performance with one single metric! Nevertheless, some are more synthetical and relevant than others. We consider Speed Index as one of the most important indicators to analyze. Let’s discover why: what does the Speed Index indicate? How is it measured? How to interpret and use it properly? Continue reading Web Performance Fundamentals: what is the Speed Index?

Google Speed Update: a Speed Ranking Signal for Mobile Searches

On July 2018, Google will use Speed as a Ranking Signal for Mobile Searches. As a service dedicated to website speed monitoring and optimization, we’re of course very interested in how Google is dealing with website speed to crawl, index and rank web pages within its search results. After Red Slow Label and Slow to Load testings conducted in 2015, and with the Mobile First Index being deployed, we should not be surprised about this last move from Google. Let’s have a quick look back on this history before detailing this Speed Update announcement.   Continue reading Google Speed Update: a Speed Ranking Signal for Mobile Searches

Website analysis: new checks in our test reports

Update: as announced 2 weeks ago, we have updated  the quality checks on Dareboost on December 12.

Save the date! From December 12, new quality checks will enrich our website analysis tool. This post aims to introduce those new quality tests. This is a major update, with numerous new tests and also improvements for existing ones. Expect your Dareboost score to change on December 12! Let’s discover the changes and hopefully this will be an opportunity for you to fix some issues even before the update.

Continue reading Website analysis: new checks in our test reports

Incident: no response from Google domains for Paris and Amsterdam probes

[08:45 PM UTC]UPDATE : the network issue seems to be fixed now, we have removed the temporary blacklists and are monitoring closely the situation.

Since about 10:00 AM UTC this Sunday (12 Nov. 2017), Dareboost is facing issues for websites tested from Paris and Amsterdam.
Only websites using resources from Google domains are affected (Google Analytics, Google Fonts, etc). As these resources are very frequently used, numerous websites are affected by the issue. Consequently we’re communicating with details on the issue, although the issue is out of our reach (the connectivity issue does not depend on our infrastructure).

All our team members are mobilized and we’re doing our best to get this issue fixed as soon as possible. Continue reading Incident: no response from Google domains for Paris and Amsterdam probes