Darko Mesaroš
@darko.rup12.net
Yelling into the camera for @AWSCloud Welcome to some cloud and retro tech tweets. ☁ 💾 Opinions and ... skeets(?)... are my own! (he/him)
https://rup12.net
:wq!
https://rup12.net
:wq!
Rust + WLED + JSON = 🚀⚡️🔥
I managed to get it down to 20ms 🤯
I managed to get it down to 20ms 🤯
February 13, 2026 at 5:57 AM
Rust + WLED + JSON = 🚀⚡️🔥
I managed to get it down to 20ms 🤯
I managed to get it down to 20ms 🤯
It’s been 26 years since the Intel 80286 came out! ❤️
Up to 25Mhz of pure speed (hopefully with a co-processor) ⚡️
Up to 25Mhz of pure speed (hopefully with a co-processor) ⚡️
February 12, 2026 at 4:53 AM
It’s been 26 years since the Intel 80286 came out! ❤️
Up to 25Mhz of pure speed (hopefully with a co-processor) ⚡️
Up to 25Mhz of pure speed (hopefully with a co-processor) ⚡️
Ran into this glorious Olivetti keyboard in my collection!
February 11, 2026 at 4:46 AM
Ran into this glorious Olivetti keyboard in my collection!
Last weekend I did something fun! I thought to myself “Can I get this 25 year old Sun Microsystems server online?” Better yet, can I have it host a website? 🤔
rup12.net/posts/can-my...
rup12.net/posts/can-my...
Can my SPARC server host a website?
The little corner of the internet owned by Darko!
rup12.net
February 9, 2026 at 3:58 PM
Last weekend I did something fun! I thought to myself “Can I get this 25 year old Sun Microsystems server online?” Better yet, can I have it host a website? 🤔
rup12.net/posts/can-my...
rup12.net/posts/can-my...
Got that Sun Ultra 60 out last night ❤️
January 17, 2026 at 11:24 PM
Got that Sun Ultra 60 out last night ❤️
Reposted by Darko Mesaroš
Part 24 of DEV Track Spotlight 🦀
DEV405 with @darko.rup12.net (AWS Principal Developer Advocate)
"With the world of LLMs, with coding assistants, with everything at your fingertips, you don't need to write Python anymore. You can write Rust."
#AWSreInvent #DEVTrack #Rust
DEV405 with @darko.rup12.net (AWS Principal Developer Advocate)
"With the world of LLMs, with coding assistants, with everything at your fingertips, you don't need to write Python anymore. You can write Rust."
#AWSreInvent #DEVTrack #Rust
January 1, 2026 at 5:33 PM
Part 24 of DEV Track Spotlight 🦀
DEV405 with @darko.rup12.net (AWS Principal Developer Advocate)
"With the world of LLMs, with coding assistants, with everything at your fingertips, you don't need to write Python anymore. You can write Rust."
#AWSreInvent #DEVTrack #Rust
DEV405 with @darko.rup12.net (AWS Principal Developer Advocate)
"With the world of LLMs, with coding assistants, with everything at your fingertips, you don't need to write Python anymore. You can write Rust."
#AWSreInvent #DEVTrack #Rust
This weeks project: Build a Rust app which generates BASIC code that prints large letters like this in Hi-Res mode!
December 28, 2025 at 9:58 PM
This weeks project: Build a Rust app which generates BASIC code that prints large letters like this in Hi-Res mode!
Let’s talk about Rust’s Result and Unwrap: youtu.be/MTFqc_XzkgU?...
Let's talk about Rust unwraps!
YouTube video by ruptwelve
youtu.be
December 25, 2025 at 7:06 PM
Let’s talk about Rust’s Result and Unwrap: youtu.be/MTFqc_XzkgU?...
Learning Rust: Configuring the AWS Rust SDK
YouTube video by ruptwelve
youtu.be
December 22, 2025 at 4:18 PM
Reposted by Darko Mesaroš
Another LGR Christmas thing! Watching/reacting/researching stuff in the Computer Chronicles Christmas Buyer's Guide from 1987
youtu.be/bWXLDfbmpU8
And that's it for both holiday videos and LGR overall in 2025. Have a happy new year and I look forward to getting back to more LGR things in January 🎉
youtu.be/bWXLDfbmpU8
And that's it for both holiday videos and LGR overall in 2025. Have a happy new year and I look forward to getting back to more LGR things in January 🎉
1987 Computer Chronicles Christmas Buyer's Guide 🎁
YouTube video by LGR
youtu.be
December 21, 2025 at 6:16 PM
Another LGR Christmas thing! Watching/reacting/researching stuff in the Computer Chronicles Christmas Buyer's Guide from 1987
youtu.be/bWXLDfbmpU8
And that's it for both holiday videos and LGR overall in 2025. Have a happy new year and I look forward to getting back to more LGR things in January 🎉
youtu.be/bWXLDfbmpU8
And that's it for both holiday videos and LGR overall in 2025. Have a happy new year and I look forward to getting back to more LGR things in January 🎉
It’s Friday evening, and I’m backing up a collection of 5.25” Floppy disks! Thank you IBM PC XT 😍
December 20, 2025 at 1:07 AM
It’s Friday evening, and I’m backing up a collection of 5.25” Floppy disks! Thank you IBM PC XT 😍
Reposted by Darko Mesaroš
Part 5 of DEV Track Spotlight 🦀
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
December 14, 2025 at 10:11 AM
Part 5 of DEV Track Spotlight 🦀
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
Reposted by Darko Mesaroš
Find someone that looks at you the way @ajs.bsky.social looks at @darko.rup12.net.
Part 5 of DEV Track Spotlight 🦀
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
DEV307 with @ajs.bsky.social (AWS Serverless Hero, Datadog) & @darko.rup12.net (AWS)
Amazon Aurora DSQL: Kotlin devs rewrote one component in Rust → 10x faster with ZERO optimization attempts!
#AWSreInvent #DEVTrack #AWSCommunity #AWSHeroes
December 14, 2025 at 10:20 AM
Find someone that looks at you the way @ajs.bsky.social looks at @darko.rup12.net.
Something very special came in a box 😍
December 17, 2025 at 12:53 AM
Something very special came in a box 😍
Yes, you CAN write MCP Servers in Rust 🦀 Here is my adventure in writing one: rup12.net/posts/write-...
Write your MCP servers in Rust
The little corner of the internet owned by Darko!
rup12.net
December 11, 2025 at 8:07 PM
Yes, you CAN write MCP Servers in Rust 🦀 Here is my adventure in writing one: rup12.net/posts/write-...
Idiomatic Rust can download and deserialize 10k CSV files from Amazon S3 in 10 seconds 🔥🔥🔥
rup12.net/posts/downlo...
rup12.net/posts/downlo...
Learning Rust: Download and deserialize 10 000 files in 9.833 seconds
The little corner of the internet owned by Darko!
rup12.net
December 10, 2025 at 1:12 AM
Idiomatic Rust can download and deserialize 10k CSV files from Amazon S3 in 10 seconds 🔥🔥🔥
rup12.net/posts/downlo...
rup12.net/posts/downlo...
What the hell is this weather NYC?! 😱🥵
July 14, 2025 at 10:20 PM
What the hell is this weather NYC?! 😱🥵
Reposted by Darko Mesaroš
Introducing Kiro - I've been testing it out for a while. It's truly a game changer.
Spec-driven development and agent hooks are a new paradigm in AI-assisted development. Check it out! 👻
kiro.dev
Spec-driven development and agent hooks are a new paradigm in AI-assisted development. Check it out! 👻
kiro.dev
Kiro
The AI IDE for prototype to production
kiro.dev
July 14, 2025 at 4:15 PM
Introducing Kiro - I've been testing it out for a while. It's truly a game changer.
Spec-driven development and agent hooks are a new paradigm in AI-assisted development. Check it out! 👻
kiro.dev
Spec-driven development and agent hooks are a new paradigm in AI-assisted development. Check it out! 👻
kiro.dev
Reposted by Darko Mesaroš
Quick trial of AWS new IDE called Kiro, compared to my current favourite tool - Claude Code..
I gave the same task to Kiro and to Claude Code. First and foremost, I love how Kiro makes requirements > design > build a first-class citizen. That's by far the best workflow at the moment, and making...
I gave the same task to Kiro and to Claude Code. First and foremost, I love how Kiro makes requirements > design > build a first-class citizen. That's by far the best workflow at the moment, and making...
July 14, 2025 at 9:19 PM
Quick trial of AWS new IDE called Kiro, compared to my current favourite tool - Claude Code..
I gave the same task to Kiro and to Claude Code. First and foremost, I love how Kiro makes requirements > design > build a first-class citizen. That's by far the best workflow at the moment, and making...
I gave the same task to Kiro and to Claude Code. First and foremost, I love how Kiro makes requirements > design > build a first-class citizen. That's by far the best workflow at the moment, and making...
Reposted by Darko Mesaroš
Well, this is awkward. AWS released a Cursor clone and it's... actually not terrible? It may be time to re-evaluate my life. kiro.dev/blog/introdu...
Introducing Kiro
A new agentic IDE that works alongside you from prototype to production
kiro.dev
July 14, 2025 at 2:00 PM
Well, this is awkward. AWS released a Cursor clone and it's... actually not terrible? It may be time to re-evaluate my life. kiro.dev/blog/introdu...
I'm feeling spooky today! 👻
July 14, 2025 at 2:01 PM
I'm feeling spooky today! 👻
For this weekend! I have unopened copies of something vintage from our friends over at Microsoft 😍
Microsoft Excel 2.1 and Microsoft Windows/286 ❤️
Microsoft Excel 2.1 and Microsoft Windows/286 ❤️
July 11, 2025 at 9:54 PM
For this weekend! I have unopened copies of something vintage from our friends over at Microsoft 😍
Microsoft Excel 2.1 and Microsoft Windows/286 ❤️
Microsoft Excel 2.1 and Microsoft Windows/286 ❤️
I thought we were ready for Wayland. I'll try again in 6 months!
July 9, 2025 at 3:30 AM
I thought we were ready for Wayland. I'll try again in 6 months!