What over a decade of number-crunching analytics has taught me is that spending an hour writing, sharing, or helping someone is infinitely more valuable than spending that hour swimming through numbers. Moreover, trying to juice the numbers almost invariably divorces you from thinking about customers and understanding people. On the surface, it seems like a convenient proxy, but it’s not. They’re just numbers. If you’re searching for business insights, talking to real people beats raw data any day. It’s not as convenient, but when is anything worth doing convenient?
Time to Interactive (TTI) is the most impactful metric to your performance score.
Therefore, to receive a high PageSpeed score, you will need a speedy TTI measurement.
At a high level, there are two significant factors that hugely influence TTI:
Matt’s publishing a newsletter on the past, present, and future of tracking:
The last 100 years have been a journey to see how to measure ghosts - how to measure the invisible audiences at the end of technological distribution networks. With every decade, these ghosts have come more and more into focus, ending with a the last ten years of social media and digital advertising that has created unimaginable amounts of data about everything we see, read, click and like.
He sees the pendulum swinging the other way now …for those who can afford it:
If there’s one constant in the economics of audience data over the last 100 years, is that we only get free services if we pay for them with our attention. This has been true for commercial radio and television, free newspapers, mobile games and digital content. If we want privacy, we have to pay for it, and not everyone can afford this. Will the right to become a ghost only be for the people with money to buy premium products?
Page web bloat score (WebBS for short) is calculated as follows:
WebBS = TotalPageSize / PageImageSize
Yes, this is a tongue-in-cheek somewhat arbitrary measurement, but it’s well worth reading through the rationale for it.
How can the image of a page be smaller than the page itself?
This is a very useful new feature in Calibre, the performance monitoring tool. Now you can get data about just how much third-party scripts are affecting your site’s performance:
The best way of circumventing fear and anxiety around third party script performance is to capture metrics that clearly articulate their performance impact.
I like Tim’s definition here:
A performance budget is a clearly defined limit on one or more performance metrics that the team agrees not to exceed, and that is used to guide design and development.
And I agree about the four attributes required for a performance budget to succeed. It must be:
The point is not to let the performance budget try to stand on its own, somewhere hidden in company documentation collecting dust. You need to be proactive about making the budget become a part of your everyday work.
A fascinating look at standards in the real world. In this case, it’s the kilogram, which is shedding its French Revolutionary roots in favour of the Planck constant.
Our messy human measurements have transcended their messy humanness; they have been melded with an eternal truth.
Mention of The Master Of The Kilogram reminded me of The Keeper Of Time.
Great ideas from Addy on where to start with creating a performance budget that can act as a red line you don’t want to cross.
If it’s worth getting fast, it’s worth staying fast.
Yes! Yes! Yes!
Our efforts to measure and improve UX are packed with tragically ironic attempts to love our users: we try to find ways to improve our app experiences by bloating them with analytics, split testing, behavioral analysis, and Net Promoter Score popovers. We stack plugins on top of third-party libraries on top of frameworks in the name of making websites “better”—whether it’s something misguided, like adding a carousel to appease some executive’s burning desire to get everything “above the fold,” or something truly intended to help people, like a support chat overlay. Often the net result is a slower page load, a frustrating experience, and/or (usually “and”) a ton of extra code and assets transferred to the browser.
Even tools that are supposed to help measure performance in order to make improvements—like, say, Real User Monitoring—require you to add a script to your web pages …thereby increasing the file size and degrading performance! It’s ironic, in that Alanis Morissette sense of not understanding what irony is.
Stacking tools upon tools may solve our problems, but it’s creating a Jenga tower of problems for our users.
This is a great article about evaluating technology.
Take a perfectly useful standardised measurement of length, weight, speed or time, and convert to something far less useful (but much more fun).
Jared’s spot-on takedown of Net Promoter Scores.
(Andy feels this is like criticising GDP, but GDP measures something that actually happened, whereas NPS, like horoscopes or tea-leaf readings, rely on clairvoyance.)
A good analysis, but my takeaway was that the article could equally be called Why it’s tricky to measure Client-side Rendering performance. In a nutshell, just looking at metrics can be misleading.
Pre-classified metrics are a good signal for measuring performance. At the end of the day though, they may not properly reflect your site’s performance story. Profile each possibility and give it the eye test.
And it’s always worth bearing this in mind:
A profile of Demetrios Matsakis, keeper of time at U.S. Naval Observatory, America’s equivalent to Greenwich in its importance for timekeeping in the modern world.
This resonates deeply with me. It is worth your heartbeats.
I didn’t count how many heartbeats it took to read this, but it was worth every single one.
I wonder how much I need to wind up Paul at work in order to push him into the red...
A proposal for decimal time and measurement. It'll never defeat inertia but I love seeing the thought process that's gone into it.
Vint Cerf announces M-Lab: an excellent resource which will allow people to find out if and how their internet access is being throttled. Viva l'internet!
A really nice visual representation of just how isolated the Imperial system is.