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First stage POWER9 Firefox JIT passes tests
Yeah, so about that OpenPOWER Minimum Viable Product JavaScript JIT for Firefox. This happened (all timings from an unoptimized debug build ...
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Go 1.18 will embed source version information into binaries
You're probably reading this page because you've attempted to access some part of my blog (Wandering Thoughts) or CSpace , the wiki thing it's part of. Unfortunately you're using a browser version that my anti-crawler precautions consider suspicious, most often because it's too old (most often this applies to versions…
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Speculating the entire x86-64 instruction set in seconds with one weird trick
As cheesy as the title sounds, I promise it cannot beat the cheesiness of the technique I’ll be telling you about in this post. The morning I saw Mark …
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I wrote a linker everyone can understand
When we wrote our assembler we made many design choices that helped us cut down on the complexity of the assembler itself. One of those decisions was to have the assembler directly output executables. That was a good choice in that it allowed us to quickly test as we were developing: once we implemented an opcode, we…
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Why Learn Haskell? (2018)
Asking a "why?" question means we want to be told a reason. But would we accept any reason? It seems not, for if any answer suffices, then the answer is irrelevant, so why bother asking?
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Data-Mining Wikipedia for Fun and Profit
The engineering blog of Bill P. Godfrey.
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Tests aren’t enough: Case study after adding type hints to urllib3
Since Python 3.5 was released in 2015 including PEP 484 and the typing module type hints have grown from a nice-to-have to an expectation for popular packages. To fulfill this expectation our team...
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How Microsoft reduced Windows 11 update size by 40%
Reducing update size is important to you, and to us. Explore the techniques we used in Windows 11.
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Formalising Mathematics: An Introduction
An introduction to the TCC course “Formalising Mathematics”
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WASM SYNTH, or, how music taught me the beauty of math
TL;DR: I built a synthesizer using C++ and WebAssembly. Check out the finished product (browser compatibility table), the source, watch the talk or keep on reading the article! The Presentation Intr
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Git from the Bottom Up (2008)
Welcome to the world of Git. I hope this document will help to advance your understanding of this powerful content tracking system, and reveal a bit of the simplicity underlying it — however dizzying its array of options may seem from the outside.
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UUID, serial or identity columns for PostgreSQL auto-generated primary keys?
How to decide what to use for autogenerated primary keys: UUID, serial or identity column? Recommendations are given!
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Buildpacks vs. Dockerfiles
Exploring the tradeoffs of building container images at scale
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Undefined behavior in C is a reading error
Considering how important “undefined behavior” has become to C semantics and the ISO/IEC JTC1/SC22/WG14 Committee, the lack of any reference to it in the K&R ANSI book is notable and the description in the 1999 C Rationale was quite modest.
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Nim 1.6.2
The Nim team is happy to announce version 1.6.2, our first patch release for Nim 1.6.
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Lua: Good, Bad, and Ugly Parts (2012)
I have been programming in Lua for about 9 months and it seemed like a good time to pause and reflect on my experience with it. I have used various languages over the years -- Perl ( soaplite.com and other projects, including my current consulting work), C ( a DHCP /DNS server for Arduino and a ping-pong juggling…
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When static makes your C code 10 times faster
Addendum : Many Hacker News commenters correctly point out that the right way to indicate to the compiler that a value does not change is const . This post is not about C best practices, but just about how one can easily get to the bottom of this kind of surprising behavior by looking at the compiler output. This…
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My Python testing style guide (2017)
This post is an attempt to catalog some of my practices around testing Python projects. It's not meant to be treated as dogma- I anticipate I'll update this significantly over time.
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New PostgreSQL Interface for Cloud Spanner
Start building on Google Cloud with $300 in free credits and 20+ always free products.
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What am I running inside my bash? (2014)
What am I running inside my bash?
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Some Reasons to Measure
A question I get asked with some frequency is: why bother measuring X, why not build something instead? More bluntly, in a recent conversation with a newsletter author, his comment on some future measurement projects I wanted to do (in the same vein as other projects like keyboard vs. mouse , keyboard , terminal and…
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The Rust compiler has gotten faster again
I worked on Rust part-time for several years at Mozilla. During that period I regularly summarized how the compiler’s performance had improved. For example: 2017-11-12 to 2019-07-24.
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Your code displays Japanese wrong
A static site to link people to when their code is displaying Japanese wrong.
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My preferred .NET console stack
An opinionated view on the boilerplate starting point of any .NET console application