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Posts by Ufuk Kayserilioglu

Yes, and the 2x factor comes from the light not just bending in space but also in time. Without treating spacetime as a single entity in which gravity acts you don't get the full magnitude of the bend, which is one of the most fundamental results from both special and general relativity.

1 week ago 5 0 0 0

Atom was sluggish, VS Code is much better.

2 weeks ago 2 0 0 0

You should short the Google stock

1 month ago 5 0 0 0
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Convert a Nova Launcher backup to Lawnchair format Convert a Nova Launcher backup to Lawnchair format - nova2lawnchair-README.md

Ever since NovaLauncher changed hands and started showing ads, I wanted to move to an alternative launcher on my Pixel, but was procrastinating since I didn't want to set up my icon/folder layout as I've grown used to it in Nova.

So today I asked Claude to fix it: gist.github.com/paracycle/2e...

1 month ago 3 0 0 0
Rubordle

Me too 🎉:

Rubordle #19 2/6

🟨⬛⬛⬛⬛
🟩🟩🟩🟩🟩

afomera.dev/games/rubordle

1 month ago 1 0 0 0

Nice!

Deploy or Die 🚨
Uptime: 97.3% | Resolved: 12/15 | S-TIER SRE

1 month ago 1 0 0 0

I'd rather be threadmaxxing!

1 month ago 1 0 1 0

I was also able to connect the dots

1 month ago 1 0 0 0

At The Container Store?

1 month ago 5 1 1 0

The confidence with which LLMs can explain a concept to you but be wrong needs its own concept.

I propose "llmsplaining"

1 month ago 11 0 0 0
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Our December README Newsletter is live. Read more here mailchi.mp/f1b4152f30f0...

Additionally, we’re excited to share Ruby Central’s 2022–2024 Annual Report, highlighting three years of open source investment, community programs, infrastructure wins, and the people who make Ruby thrive.

3 months ago 5 2 1 0
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Implement moving Immix in MMTk by peterzhu2118 · Pull Request #15744 · ruby/ruby This commit implements moving Immix in MMTk, which allows objects to move in the GC. The performance of this implementation is not yet amazing. It is very similar to non-moving Immix in many of the...

Ruby has a new moving GC. I just merged moving Immix in the MMTk Ruby binding. This is exciting as its the first GC that dynamically detects fragmentation in the heap and performs defragmentation. Performance isn't too great yet but I'm working on it! github.com/ruby/ruby/pu...

3 months ago 27 6 0 0
Takashi Kokubun, ZJIT: The future of Ruby performance. San Francisco Ruby Conference 2025.
Takashi Kokubun, ZJIT: The future of Ruby performance. San Francisco Ruby Conference 2025. YouTube video by Evil Martians

@k0kubun.com talked about ZJIT, the next generation of YJIT for Ruby 3.5. He explained how to use it to improve Ruby’s speed in Ruby and Rails infrastructures.

3 months ago 12 5 2 0
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ZJIT is now available in Ruby 4.0 ZJIT is now available with the release of Ruby 4.0. Here’s an update of our progress.

ZJIT is available starting in Ruby 4.0! Please try it out on your test suite, maybe in a staging environment, and let us know how it goes!

railsatscale.com/2025-12-24-l...

3 months ago 20 7 2 0
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Introducing Aliki: A Modern Theme for Ruby Documentation Ruby’s documentation gets a fresh look. Starting with RDoc 7.0.0, Aliki is the new default theme—bringing dark mode, better search, and a modern layout to docs.ruby-lang.org and gem documentation.

#rubyrelease30th I’d like to introduce Aliki, RDoc and docs.ruby-lang.org’s new theme 😄
railsatscale.com/2025-12-22-i...

3 months ago 30 7 1 0

MathTube is my favorite corner of the internet for sure.

3 months ago 2 0 0 0

Love it, it looks great! Happy to see a refreshed website for Ruby. Thank you for all the work and effort.

3 months ago 4 0 0 0
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RubyConf 2026 Program Committee Interest Form Hello and welcome! We are excited to announce our recruiting search has officially opened for the the 2026 RubyConf Program Committee Members. RubyConf 2026 will be happening in Las Vegas, July 14 -…

Last call! Program Committee applications close on December 22. If you're passionate about shaping RubyConf’s content — from keynote visioning to speaker selection — this is your chance to have a meaningful impact. Apply here → docs.google.com/forms/d/e/1F...

3 months ago 3 2 0 0

Connecting it to a UPS is something you didn't do apparently. How dare you, Aaron!

3 months ago 1 0 0 0

Airplanes have a lot of baggage, no wonder they get pushback

3 months ago 4 0 0 0
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It is the substitution character, so I guess they thought they needed to substitute it.

3 months ago 5 0 0 0

"was" is doing a lot of heavy lifting in that sentence.

3 months ago 2 0 0 0

Chesterton might have beaten you to it.

4 months ago 1 0 0 0
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Optimizing Ruby performance: Observations from thousands of real-world services | Datadog Learn about trends in Ruby development and opportunities for improving performance that many organizations are leaving on the table.

"Our data backs up other findings that Ruby applications are generally less I/O-heavy, spending as much or more time on CPU as they do waiting on other services or database requests."

www.datadoghq.com/blog/ruby-pe...

4 months ago 29 8 3 0
A catalog of side effects Optimizing compilers like to keep track of each IR instruction’s effects. An instruction’s effects vary wildly from having no effects at all, to writing a specific variable, to completely unknown (wri...

This post has been sitting around in my drafts since March... I hope it has its intended effect

bernsteinbear.com/blog/compile...

4 months ago 14 3 0 0
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I'm very honored to have received this year's RubyPrize from Matz's hands in Matsue last Thursday, recognizing my work on Ruby and its development tools.

I can still remember how nervous I was asking Matz for a picture back in 2016 😂 Time really flies

(Photo from @hsbt.org ❤️)

4 months ago 49 8 3 0

Also please don't restrict bundler and ruby versions like `bundler < 3.0` and `required_ruby_version < 4.0` 🙏

5 months ago 24 7 0 1
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関係者かのように最前列で撮影をしている

4 months ago 18 1 0 0

Awesome, this was a great read.

4 months ago 3 0 0 0
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Why Ruby Devs Keep Mixing Up Symbols and Frozen Strings; and How to Tell Them Apart Every time Ruby developers start talking about # frozen_string_literal: true, someone inevitably...

Hi @ufuk.dev, The article is live here: dev.to/hinokami_dev...

Thank you @byroot.bsky.social for the detailed feedback. Your insights on interning and hashing made it much stronger.

4 months ago 9 2 1 0