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From error-handling to structured concurrency How should we think about error-handling in concurrent programs? In single-threaded programs, we’ve...
23rd Mar 2026
1

From error-handling to structured concurrency

from Posts on Made of Bugs [alt+shift+b] in technology

23rd Mar 2026
How should we think about error-handling in concurrent programs? In single-threaded programs, we’ve mostly converged on a standard pattern, with a diverse zoo of implementations and concrete patterns. When an error occurs, it is propagated up the stack until we find a stack frame...
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Solving Regex Crosswords with Z3 For a while now, I’ve been fascinated by Z3 and by SMT solving more broadly. While on pat leave...
21st Oct 2025
1

Solving Regex Crosswords with Z3

from Posts on Made of Bugs [alt+shift+b] in technology

21st Oct 2025
For a while now, I’ve been fascinated by Z3 and by SMT solving more broadly. While on pat leave recently, I was reminded of the existence of regular-expression crossword puzzles, and allowed myself to get nerdsniped by writing a Z3-backed solver. I expected to spend perhaps an...
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The ITTAGE indirect branch predictor While investigating the performance of the new Python 3.14 tail-calling interpreter, I learned (via...
4th Jul 2025
1

The ITTAGE indirect branch predictor

from Posts on Made of Bugs [alt+shift+b] in technology

4th Jul 2025
While investigating the performance of the new Python 3.14 tail-calling interpreter, I learned (via this very informative comment from Sam Gross) new (to me) piece of performance trivia: Modern CPUs mostly no longer struggle to predict the bytecode-dispatch indirect jump inside a...
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Performance of the Python 3.14 tail-call interpreter About a month ago, the CPython project merged a new implementation strategy for their bytecode...
9th Mar 2025
62

Performance of the Python 3.14 tail-call interpreter

from Posts on Made of Bugs [alt+shift+b] in technology

9th Mar 2025
About a month ago, the CPython project merged a new implementation strategy for their bytecode interpreter. The initial headline results were very impressive, showing a 10-15% performance improvement on average across a wide range of benchmarks across a variety of...
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Building personal software with Claude Earlier this month, I used Claude to port (parts of) an Emacs package into Rust, shrinking the...
27th Jan 2025
71

Building personal software with Claude

from Posts on Made of Bugs [alt+shift+b] in technology

27th Jan 2025
Earlier this month, I used Claude to port (parts of) an Emacs package into Rust, shrinking the execution time by a factor of 1000 or more (in one concrete case: from 90s to about 15ms). This is a variety of yak-shave that I do somewhat routinely, both professionally and in...
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Finding near-duplicates with Jaccard similarity and MinHash Suppose we have a large collection of documents, and we wish you identify which documents are...
3rd Jul 2024
65

Finding near-duplicates with Jaccard similarity and MinHash

from Posts on Made of Bugs [alt+shift+b] in technology

3rd Jul 2024
Suppose we have a large collection of documents, and we wish you identify which documents are approximately the same as each other. For instance, we may have crawled the web over some period of time, and expect to have fetched the “same page” several times, but to see slight...
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Stripe's monorepo developer environment I worked at Stripe for about seven years, from 2012 to 2019. Over that time, I used and contributed...
21st May 2024
55

Stripe's monorepo developer environment

from Posts on Made of Bugs [alt+shift+b] in technology

21st May 2024
I worked at Stripe for about seven years, from 2012 to 2019. Over that time, I used and contributed to many generations of Stripe’s developer environment – the tools that engineers used daily to write and test code. I think Stripe did a pretty good job designing and building that...
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Advent of Code in C++ Template Metaprogramming This December, the imp of the perverse struck me, and I decided to see how many days of Advent of...
8th Dec 2023
52

Advent of Code in C++ Template Metaprogramming

from Posts on Made of Bugs [alt+shift+b] in technology

8th Dec 2023
This December, the imp of the perverse struck me, and I decided to see how many days of Advent of Code I could do purely in compile-time C++ metaprogramming. As of this writing, I’ve done two days, and I’m not sure I’ll make it any further. However, that’s one more day than I...
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What's with ML software and pickles? I have spent many years as an software engineer who was a total outsider to machine-learning, but...
8th Nov 2023
31

What's with ML software and pickles?

from Posts on Made of Bugs [alt+shift+b] in technology

8th Nov 2023
I have spent many years as an software engineer who was a total outsider to machine-learning, but with some curiosity and occasional peripheral interactions with it. During this time, a recurring theme for me was horror (and, to be honest, disdain) every time I encountered the...
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Graceful behavior at capacity Suppose we’ve got a service. We’ll gloss over the details for now, but let’s stipulate that it...
7th Aug 2023
27

Graceful behavior at capacity

from Posts on Made of Bugs [alt+shift+b] in technology

7th Aug 2023
Suppose we’ve got a service. We’ll gloss over the details for now, but let’s stipulate that it accepts requests from the outside world, and takes some action in response. Maybe those requests are HTTP requests, or RPCs, or just incoming packets to be routed at the network layer....
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