@oldmoe

Xoogler, Rubyist, SQLitist

 Munich, Bavaria
Joined May 2008
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Porting from Rails to a decent Ruby stack yields a lot more performance while using a lot less memory. I believe more can be gained from further optimization. Won't reach Rust levels of course so probably won't be up to Don Quixote's standards!
DHH
@dhhOct 5
Last conversion of the Campfire from my token stash goes to JavaScript/Express. As with the others, I'm sure you can find more to optimize. But this gives you a sense of what order of magnitude these options exist within with agent-led development. github.com/basecamp/once-cam…
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I am not sure what dhh is proposing here as he talks about exerting extreme violence? Is he calling for killing me and my family since we are Muslims living in Europe? or just expel us? Maybe force convert us to Christianity in an inquisition? So based!
DHH
@dhhOct 2
It took the Reconquista nearly eight hundred years to reclaim Spain. Don't give me that loser talk that it's "too late for Europe." The next generation coming up is unbelievably based. They've seen what suicidal empathy has wrought upon their nations. Never lose faith.
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I think the Rails World keynote fueled a lot of discussion and debate in the Rails & the wider Ruby community. But I also think it's about time to have such a discussion. I share my own experience & some of the great work the community is doing here oldmoe.blog/2026/10/02/its-a…

It’s about time!

TL;DR Rails is slow, but Ruby can be fast. A lean Ruby stack works very well, 10x more throughput than Rails in my own benchmarks, and LLMs can help maintain it for you. What’s up? A lot of d…

oldmoe.blog
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I have encountered a very interesting SQLite issue (not a SQLite bug, a user error though) on a production app that I think is worth sharing. So SQLite has this busy handler callback feature, where you register a callback to handler busy errors. The feature doc page warns: 1/n
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There was no way to access this data except via this process itself and when it was killed, boof, this phantom data were all gone! Thankfully not much was lost and most was recoverable through other means (logging, APIs) 5/n
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But it was a reminder that concurrency is hard, and if there is a window for an error, it will eventually happen, no matter how small that window is. Also SQLite rocks, it feels like the docs are indeed, complete, and cover everything you might face! 6/6
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If you are building a really high performance data ingestion pipeline, what matters most is how many pages you are touching per tx and in which cache level (L1, L2, L3) would they fit. WAL helps, but it will largely depend on how many records are written per page in a single tx
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user1: why is this slow? rails dev investigates: oh, it’s N+1 AR queries. user2: why is this slow? C dev investigates: oh, it’s N+1 malloc(). the similarity is uncanny.
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Don't do expensive stuff in a loop Prepare all you need first then iterate and do whatever
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Spent a little time optimizing a hot route on a Ruby Roda + SQLite JSON API app 15 db queries: 1 refactored, 3 new indexes & all now use prepared statements DB time was ~5ms per req, now ~500us per req Most of the req time was in DB, reqs now are under 1 ms Roda + SQLite FTW!
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Matching actions with declared intent!
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Great news all over, the war in Gaza seems to be over and better judgement about app server is coming into the Ruby community. Falcon improves on execution context memory overhead than any threaded/forked solution which is one of the big bottlenecks we deal with in Ruby land
Ilya Grigorik
@igrigorik9 Oct 2025
Falcon is now serving most of Shopify storefront traffic: web and API. It's solid, delivered big wins already, and unlocks a huge swath of new storefront optimizations we'll be trickling out over time. Performance is an evergreen quest at Shopify. 🏃‍♀️🏃‍♂️ 💨
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Even though they try to justify their crimes, they know they are the monsters and they and their accomplices* are OK with it. * By active support or mere silence
Shaiel Ben-Ephraim
@academic_la11 Aug 2025
Here is why starving children is fine, here is why targeting journalists is fine, here is why destroying hospitals is fine, here is why destroying every house in Gaza is fine, here is why shooting people in line for food is fine. Do you hear yourselves? Are you fucking serious?
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I believe the only chance Americans can get the Epstein truth out (and withstand the assured political avalanche) is to vote someone unrelated to both parties (and whoever is blackmailing them) to office. And that is not guaranteed, but any other way guarantees nothing happens
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When building really high perf data pipelines you can hit a wall when you try to insert or update many related tables The overheads from binding (mostly similar) data to each statement and calling them becomes a good chunk of your overhead 1/3
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A more efficient way is to create a view that represents your variable set. Then create an INSTEAD OF trigger on the view to fan the data out to the target tables. By inserting into the view, you bind the data once and visit the DB once, and all your inserts take one trip. 2/3
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Needless to say, don't do this for your blog or CMS app! I am talking in the context of really high performance data pipelines with huge volumes of data ingestion. For all other use cases, optimize for readability & maintainability! 3/3
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