Howard van Rooijen
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hvr.endj.in
Howard van Rooijen
@hvr.endj.in
Founder @endjin.com Microsoft #MVP for Azure & Developer Technologies. Try to help people and orgs to become the best versions of themselves.
What an absolute joke Anthropic! A Max 20x account that lasts 2.5 days light use?
October 4, 2025 at 10:34 AM
Here's the chart of the incremental perf improvements we've got for free (no code changes required) since .NET Core 2
September 13, 2025 at 7:42 AM
It's nice to see that viewers feel the same way I do. The content my @endjin.com colleagues produce is the best you'll find on the interwebs.
August 8, 2025 at 5:27 PM
I've recently been watching The Great. It's aptly named. This line / facial expression has had me chuckling. I'd have the same reaction.
July 5, 2025 at 11:19 AM
Was on godfather duties for a birthday party for 5 YO's yesterday. Discovered the Holy Grail of Party Rings.
June 8, 2025 at 4:51 AM
Ed Freeman presented "#MicrosoftFabric: Too Many Options - Which One(s) Should I Choose?" At the Oxford Data Platform User Group this week. I completely forgot to take any photos. So here's the excellent Yuzu I had for pudding when we went to Sticks 'n' Sushi afterwards
May 10, 2025 at 11:12 AM
Hell yes!
May 6, 2025 at 8:13 AM
Much wicker was burnt.
May 4, 2025 at 12:35 PM
Good (Turkish) eggs
April 12, 2025 at 11:13 AM
Good (Turkish) eggs
April 12, 2025 at 11:12 AM
A brief trip to Reading to spend some quality time with James Broome, also resulted in an excellent breakfast burrito from Richfields Deli & Grill. That might become a regular thing
April 12, 2025 at 10:18 AM
Very excited about this! @marklawrenceauthor.bsky.social is an absolutely fantastic author and he somehow gets better with every book.
April 10, 2025 at 7:29 AM
Coming along nicely...
April 6, 2025 at 1:37 PM
First BBQ of the year. I'm giving the Kellybab a go, although I don't have a rotisserie
meatsmokefire.co.uk/big-green-eg...
April 6, 2025 at 12:01 PM
Ah, it dropped the last 3. So test from last post applies to these
January 31, 2025 at 4:29 PM
Here you go. I hope it posts in order.

The C code is embedded in EBPF to run in the kernel. They then use wireguard to manage the connections and route between instances with the same network id. It's very, simple, and very clever
January 31, 2025 at 4:28 PM
Utterly exhausted after hosting the family on Boxing Day. Followed the Fallow Turkey recipe (brine, butcher, bacon + legs + stuffing). Also Meat Merchant Sugat Pit Bacon Rack. Absolutely awesome. Looking forward to a lazy day of recovery.
December 27, 2024 at 8:13 AM
My sister wanted to do the summer solstice at Stone Henge this year (as it was her 50th birthday this year) - that was a great experience, would recommend.
December 21, 2024 at 9:00 AM
Excellent "all you can eat" Thanksgiving Dinner at Texas Joes last night. Probably the first time I truly got the "being thankful for" bit, as shortly after last year's dinner my friend was diagnosed with a brain tumour. He's fully recovered now. So much can happen in a short time.
November 29, 2024 at 9:57 AM
2 boxes consumed. 3 to go. Mince pies really are perfect 4pm snack with an assam cup of tea.
November 27, 2024 at 4:38 PM
Birthday yesterday. Not sure how I got this old. Found solace with excellent tapas. Lots were eaten, but there were 4 of us, just in case you think I could do all of that solo!
November 21, 2024 at 8:21 AM
Very nice to see @endjin.com get a mention in the .NET 9 keynote!
November 14, 2024 at 7:11 AM
The full graph of:
- Python numpy matmul
- C# Naive loop
- C# Loop with flipped matrix
- C# Loop with flipped matrix and SIMD

You may need to squint a bit.
November 4, 2024 at 8:13 AM
Just in case you wanted to see the performance difference between Python & C# outlined in Ian's Compute Intensive Workloads blog post:
November 4, 2024 at 8:11 AM
November 6, 2023 at 7:15 PM