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Profiling Go Programs
How to use Go's built-in profiler to understand and optimize your programs.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 21,842 posts.
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How to Find and Stop Running Queries on PostgreSQL
Your PostgreSQL server is seizing up, with some naughty queries consuming too many resources or blocking others. Don’t panic! You can stop those problem queries and stabilize your system.
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Dealing with APIs, JSON and databases in org-mode
A practical Org-mode workflow for calling APIs, working with JSON responses, and querying the resulting data with databases and executable blocks.
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Anyone Can Learn to Code an LSTM-RNN (Part 1: RNN)
A machine learning craftsmanship blog.
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57 Small Programs that Crash Compilers
I noticed there are no MSVC examples in there — was it not a targeted compiler? If so, I’m curious as to why.
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Hacking cars in JavaScript (Replay attacks in the browser with the HackRF)
Collection of side projects, conference talks and blog posts experimenting with frontend technologies and human-computer interaction
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Five Things Old Programmers Should Remember
(even if you’re not that old)
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Walken on Rails
Our new screencast series features narration by Christopher Walken.
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Modelling game economy with Neo4j
Learn to build production-ready serverless applications on AWS
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The Asynchronous Computability Theorem
In this post I describe the Asynchronous Computability Theorem, which uses tools from Algebraic Topology to show whether a task is solvable…
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Our Journey with Apache Arrow (Part 2): Adaptive Schemas and Sorting
In the previous article, we discussed our use of Apache Arrow within the context of the OpenTelemetry project. We investigated various techniques to maximize the efficiency of Apache Arrow, aiming to find the optimal balance between data compression ratio and queryability. The compression results speak for themselves…
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Python code makes any song swing
[tweetmeme source= ‘plamere’ only_single=false] One of my favorite hacks at last weekend’s Music Hack Day is Tristan’s Swinger. The Swinger is a bit of python code that tak…
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Language, trees, and geometry in neural networks
Language is made of discrete structures, yet neural networks operate on continuous data: vectors in high-dimensional space. A successful language-processing network must translate this symbolic information into some kind of geometric representation—but in what form? Word embeddings provide two well-known examples…
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High-Throughput, Formal-Methods-Assisted Fuzzing for LLVM
Mutation-based fuzzing is based on the idea that new, bug-triggering inputs can often be created by randomly modifying existing, non-bug-triggering inputs. For example, if we wanted to find bugs in a PDF reader, we could grab a bunch of PDF files off the web, mutate them by flipping a few bits or something, and feed…
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Document Clustering with Python
ASIAN4D membahas apakah pola Toto4D benar-benar ada, bagaimana cara pemain membacanya, serta insight sederhana yang sering dipakai pemain Indonesia.
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Lightmap Compression in the Witness
In my initial implementation of our lightmapping technology I simply stored lightmap textures in RGBA16F format. This produced excellent results, but at a very high memory cost. I later switched to the R10G10B10A2 fixed point format to reduce the memory footprint of our lightmaps, but that introduce
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The need for memory safety standards
For decades, memory safety vulnerabilities have been at the center of various security incidents across the industry, eroding trust in technology and costing billions. T…
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Fast high-level programming languages
Python and R are slow when they can’t rely on functionality or libraries backed by C/C++. They are inefficient not only for certain algorithm development but also for common tasks such as FASTQ parsing. Using these languages limits the reach of biologists. Sometimes you may have a brilliant idea but can’t deliver a…
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“What the Hardware Does” Is Not What Your Program Does: Uninitialized Memory
This post is about uninitialized memory, but also about the semantics of highly optimized “low-level” languages in general. I will try to convince you that reasoning by “what the hardware d...
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Classes are a way of writing higher order functions
Joe and I recently kicked off a re-read of SICP . I can say that it is the most interesting textbook I have gone through. Imagine, you begin with just 4 or 5 constructs, and you end up building algebraic equation solvers, circuit simulators, and even logic programming languages. Because you start off with such few…
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A 2024 Plea for Lean Software
This post is dedicated to the memory of Niklaus Wirth, a computing pioneer who passed away January 1st. In 1995 he wrote an influential article called “A Plea for Lean Software”, and in what follows, I try to make the same case nearly 30 years later, updated for today’s computing horrors. The really short version: the…
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Notebooks Are McDonalds of Code
You can come to McDonalds and order a salad, but you won't. Same with notebooks, you can write NASA-production-grade software in a notebook, but most likely you won't. Notebooks make you lazy, and encourage bad practices.
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Rust’s worst feature
There are several aspects of Rust that I’m not particularly fond of but the one that takes the cake is core::io::BorrowedBuf which I despise with passion. It’s a nightly feature which puts in question my extreme emotions about it. On the other hand it means there’s time to stop it from getting stabilised and figure…
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Why is Windows still tinkering with critical sections? – The Old New Thing
The critical section may be an old dog, but it's still learning new tricks.