Erwin Hofman

# personal
I'm from The Netherlands, started developing just before 2000. Always as an independent developer, later on started an agency with focus on pagespeed, privacy and accessibility (now ran by my wife) and became a consultant + speaker in 2016.

# current occupation
- Independently helping ecomm & agencies with pagespeed audits & training
- co-creator of RUMvision to allow website owners to monitor Core Web Vitals + more
- enjoying visiting (performance.now FTW!) and speaking at events

2025-04-23

@Schepp @matuzo thanks for sharing! That was a fun and nuanced subject to write about, especially as I'm still seeing it today so I already wanted to dive into this topic a bit more for a while πŸ€“

Erwin Hofman boosted:
Krijn HoetmerKrijnHoetmer
2024-07-02

We just launched our early-bird ticket sales for November 14 & 15, with @Kara, @daniel, Karlijn LΓΆwik, @paulcalvano, @mandymichael, @grigs, Anna Migas and @erwin

Who's joining us in Amsterdam, at the fifth ? perfnow.nl/

2023-02-16

But also:
β†’ Easily navigate to our other free tools via the navigation while keeping your domain;
β†’ So far, 2300+ domains tested their #UX + #CoreWebVitals data;
β†’ To see trends of multiple domains/competitors in one chart, you can register to www.rumvision.com (still free, no creditcard required etc πŸ‘Œ)

2023-02-16

Last week, we might have been no 1️⃣ to implement the new #CrUX API to get #pagespeed data, but we didn't stop there.

Some updates:
β†’ Caching and thus speed of the tool improved;
β†’ Distribution in percentages + 4-week trend on mouseover;

β†’ We tie together data of the 2 CrUX API's, so it is as complete + up-to-date as it gets;
β†’ If your domain only has desktop origin data, you won't see "No data" anymore;
β†’ Your site might not have data for all weeks. Those will now be treated accordingly;

2023-02-10

@tunetheweb @powdercloud awesome, thanks for pushing the histogram-data then πŸ™Œ generally makes visualization finger-licking good πŸ˜€ (allowing others to interpret them just is different challenge).

2023-02-10

@tunetheweb I'm now becoming curious by the way: next to helping to get the CrUX article/announcement out there, did you also work/coding on this API? πŸ€“

2023-02-10

@tunetheweb thanks for the shout-out Barry! πŸ˜€

Erwin Hofman boosted:
2023-02-10

Nice work by @erwin to already have integrated the CrUX History API into RUMvision:
rumvision.com/tools/core-web-v

2022-11-21

# current occupation
- Independently helping ecomm & agencies with pagespeed audits & training
- co-creator of RUMvision (#RUM #SaaS) to allow website owners to monitor #CoreWebVitals + more
- enjoying visiting (performance.now FTW!) and speaking at events

Next event I'll be visiting: Meet Commerce in Madrid, December 13th

2022-11-21

#personal #introduction
I'm from The Netherlands -where it's very chilly currently-, started developing just before 2000. Always as an independent developer, later on started an agency with focus on pagespeed, privacy and accessibility (now ran by my wife + devs) and became a consultant + speaker to share knowledge/best practices in 2016.

I'm especially active at LinkedIn instead of Twitter (@blue2blond). Lack of Twitter's algorithm might change that over here though.

Client Info

Server: https://mastodon.social
Version: 2025.04
Repository: https://github.com/cyevgeniy/lmst