Teiva Harsanyi
💻 Software engineer at Google
☕ The Coder Cafe newsletter https://thecoder.cafe
📖 100 Go Mistakes author 100go.co/book
🏠 https://teivah.dev
改善
- "The cold start problem is a chicken-and-egg problem: no users without value, no value without users." read.thecoder.cafe/p/cold-start...
- Build Your Own Key-Value Storage Engine: Week 4 (Written in collaboration with @scylladb.com) This week, we explore how to handle deletes and compaction in LSM trees. read.thecoder.cafe/p/build-your...
- Build Your Own Key-Value Storage Engine—Week 3: Durability with Write-Ahead Logging (Written in collaboration with @scylladb.com ) This week, we explore how to make data durable with the use of a WAL. read.thecoder.cafe/p/build-your...
- Linus Torvalds vs. Ambiguous Abstractions read.thecoder.cafe/p/linus-torv...
- Build Your Own Key-Value Storage Engine—Week 2: In-Memory Store (Written in collaboration with @scylladb.com) This week, we explore the foundations of LSM trees: memtable and SSTables. read.thecoder.cafe/p/build-your...
- "No act of kindness, no matter how small, is ever wasted." [New post] Nothing Beats Kindness: Celebrating World Kindness Day 🎉 read.thecoder.cafe/p/nothing-be...
- Build Your Own Key-Value Storage Engine—Week 1: In-Memory Store The beginning of the series written in collaboration with @scylladb.com where we explore key-value storage engines. This week, we start with a simple in-memory storage and the validation client. read.thecoder.cafe/p/build-your...
- 🎃 Horror Coding Stories: Therac-25—A deadly race condition and overflow read.thecoder.cafe/p/therac-25
- Falsehoods Programmers Believe About Names www.kalzumeus.com/2010/06/17/f...
- [New post] Speed vs. Velocity: The Difference Between Moving Fast and Moving Forward read.thecoder.cafe/p/speed-vs-v...
- Reposted by Teiva HarsanyiAt long last, @chris.blue and I have submitted the final manuscript of Designing Data-Intensive Applications, second edition, to the publisher. There is always more that could be improved but at some point we just have to call it done. Now it goes into production; probably shipping in ~4 months.
- I just got my 🇬🇧 visa.
- [New post] Conflict-Free Replicated Data Types (CRDTs): Convergence Without Coordination read.thecoder.cafe/p/crdt
- I created a new root website for thecoder.cafe and moved the newsletter to read.thecoder.cafe. Thanks to @Cloudflare, which enabled a smooth transition.
- I vibe code the same way I play: saving my progress every 15 seconds.
- Reposted by Teiva HarsanyiP99 CONF is next week! Which talks are on your "can't miss" list?
- Agentic Design Patterns docs.google.com/document/d/1...
- The Story of The Coder Cafe: Celebrating the First Year This is my story behind the creation of a tech newsletter: the process, the ideas, the struggles, etc. www.thecoder.cafe/p/the-coder-...
- Today marks the birthday of my newsletter 🥳! It turns out that I wrote quite a bit during the year, so I decided to compile all the posts and release them as a book (260 pages). The book is available on Leanpub: DRM-free EPUB/PDF. Get the book: leanpub.com/thecodercafe... RT appreciated 🙏.
- I re-enabled my Calendly session: calendly.com/teiva-harsan... If you want to chat about tech, non-tech topics, whatever, feel free to book a slot!
- 📢 New post: Organic Growth vs. Controlled Growth What Kind of Garden Is Your Codebase? www.thecoder.cafe/p/organic-gr...
- TIL: The RUM Conjecture In short, the conjecture says that any access method faces a 3-way trade-off among read overhead, update overhead, and memory/space overhead and you can optimize at most two.
- It explains why, for example, LSM trees achieve low write/update cost but pay in read amplification or memory. The whitepaper: openproceedings.org/2016/conf/ed...
- My notes on the SILK: Preventing Latency Spikes in LSM Key-Value Stores whitepaper. substack.com/@teivah/note...
- Sort Lines in Source Code testing.googleblog.com/2025/09/sort...
- What Makes System Calls Expensive: A Linux Internals Deep Dive. blog.codingconfessions.com/p/what-makes... Another great post by @abhi9u.bsky.social. I learned a lot, including vDSO.
- 📢 New post What I Learned During My Paternity Leave Books, Code, and Fatherhood www.thecoder.cafe/p/paternity-...
- I've updated one of my top posts with additional examples from Gmail and Instagram. Latency and User Experience www.thecoder.cafe/p/latency-an...
- Writing Code Is Easy. Reading It Isn’t. idiallo.com/blog/writing...
- The Coder Cafe is a top 100 rising Substack in Technology. substack.com/leaderboard/... 👉 thecoder.cafe
- wal3: A Write-Ahead Log for Chroma, Built on Object Storage trychroma.com/engineering/...
- Second Brain: A System to Capture, Organize, and Reuse Everything You Learn www.thecoder.cafe/p/second-brain
- The Story Of Strongly Happens Before I’m still learning C++ so I was far from understanding everything but this post was awesome anyway. nekrozqliphort.github.io/posts/happen...
- %CPU Utilization Is a Lie Observing the impact of hyperthreading during stress tests. www.brendanlong.com/cpu-utilizat...
- Replacing a cache service with a database avi.im/blag/2025/db...
- AI Models Need a Virtual Machine blog.sigplan.org/2025/08/29/a...
- Do the simplest thing that could possibly work www.seangoedecke.com/the-simplest...
- How to slow down a program? And why it can be useful stefan-marr.de/2025/08/how-...
- 🧵 After 10 months, here are the top 5 posts from my newsletter, The Coder Cafe.
- Working on Complex Systems: What I Learned Working at Google Written on holiday in Sweden 🇸🇪 where I explored complicated vs. complex systems, plus patterns & solutions. 65k reads. www.thecoder.cafe/p/complex-sy...
- So, I Wrote a Book: The Story Behind 100 Go Mistakes and How to Avoid Them I always wanted to write a retrospective on my journey. It took me years to start, but I’m happy with how it turned out. 40k reads. www.thecoder.cafe/p/100-go-mis...
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- Das Problem mit German Strings And why I don't want my database to choose the best encoding for me (yet) www.polarsignals.com/blog/posts/2...
- Availability Models: Because “Highly Available” Isn’t Saying Much www.thecoder.cafe/p/availabili...
- Read that f*cking code! etsd.tech/posts/rtfc/
- Why I Switched to Vim Keybindings www.thecoder.cafe/p/vim-keybin...
