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Does showing seconds in the system tray actually use more power?
Welcome to LTT Labs - your go-to destination for all things tech. Explore comprehensive test results, insightful commentary, and the latest analysis in hardware.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 6,942 posts.
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Memory management in C programs (2014)
One large difference between C and most other programming languages is that in C, you have to handle memory yourself rather than having a garbage collector do it for you. Ensuring that memory is allocated at the correct moment is not very difficult (and something that needs to be done manually in pretty much every…
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Running one’s own root Certificate Authority in 2023
A tale how running your own x509 root CA – for internal services – changed in the last 20 years.
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My Unholy Battle with a Rock64
I’ve got this rock64, which is an aarch64 board comparable to a Raspberry Pi 3 B+ with 4 gigs of ram. For years I’ve wanted to put a distribution on here that doesn’t have a premade image available, mainly because out of all the options on that page I don’t actually like any of them. Well, except NetBSD, but NetBSD…
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Huge Binaries
A problem I experienced when pursuing my PhD and submitting academic articles was that I had built solutions to problems that required dramatic scale to be effective and worthwhile. Responses to my publication submissions often claimed such problems did not exist; however, I had observed them during my time within…
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Why are there both TMP and TEMP environment variables? (2015)
Parallel evolution.
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Rust and C++ on Floating-Point Intensive Code
I have developed some interest in the Rust programming language. Rust is a systems programming language which means it gets out of the way of developers interested in reaching low-level internals of a system. What sets it aside from other systems languages though is: Borrow checking to guarantee memory safety…
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Reversing Bits in C
The Corner is Square's technical blog covering software engineering, APIs, data, open source and more.
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ClickHouse cost-efficiency in action: analyzing 500B rows on an Intel NUC
See how ClickHouse delivers faster query performance on 500 billion rows of data compared to ScyllaDB, leveraging an Intel NUC mini PC, advanced compression, and materialized views.
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Branchless Quicksort faster than std:sort and pdqsort with C and C++ API
Performance results naturally depend on the underlying hardware. The following benchmarks show the execution times for sorting 50 million doubles using different sorting implementations. The measurements were taken on an Apple M1 system using Clang and on an AMD Ryzen 3 Linux system using GCC , both compiled with the…
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Understanding Connections and Pools
What connections are, how they affect our systems, and how and why pooling works.
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Feeding data to 1000 CPUs – comparison of S3, Google, Azure storage
Benchmarking throughput and latency of Amazon AWS Simple Storage Service (S3), Google Cloud Storage (GCS) and Microsoft Azure Storage object storage services
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Git’s database internals I: packed object store
This blog series will examine Git’s internals to help make your engineering system more efficient. Part I discusses how Git stores its data in packfiles using custom compression techniques.
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How I Got a 2x Speedup With One Line of Code
If you had asked me whether or not it was possible to get a 2x speedup for my LazySorted project by adding a single line of code, I would have told you "No way, substantial speedups can really only come from algorithm changes." But surprisingly, I was able to do so by adding a single line using the __builtin_prefetch…
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Introducing Riptide: WebKit's Retreating Wavefront Concurrent Garbage Collector
The new Riptide garbage collector in WebKit leads to a five-fold improvement in latency in the JetStream/splay-latency test.
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A general overview of what happens before main() (2019)
8 April 2019 by Phillip Johnston • Last updated 22 August 2022For most programmers, a C or C++ program’s life begins at the main function. They are blissfully unaware of the hidden steps that happen between invoking a program and executing main. Depending on the program and the compiler, there are all kinds of…
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How to train large models on many GPUs? (2021)
[Updated on 2022-03-13: add expert choice routing.] [Updated on 2022-06-10]: Greg and I wrote a shorted and upgraded version of this post, published on OpenAI Blog: “Techniques for Training Large Neural Networks”
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Making Direct3D games faster in Wine using modern OpenGL
I play World of Warcraft . Being a Linux user requires me to run this in Wine , a Windows API translation layer. While Wine is continuously improving, its performance in Direct3D games still leaves much to be desired.
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Processing Strings 109x Faster Than Nvidia on H100
StringZilla v4 brings CUDA acceleration for string processing: 109x faster than Nvidia's CuDF on edit distances, plus 52-bit MinHash fingerprinting and AES-based hashing.
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From macOS to FreeBSD
Personal experience with moving away from Apple's world.
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Machine Code Isn't Scary
Machine code isn't scary. If you can make sure your JSON conforms to a JSON schema, you can write machine code.
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Best practices can slow your application down
In order to get the most performant site possible when building the codebase for our public Stack Overflow site, we didn’t always follow best practices.
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Azure Linux 4.0 is Microsoft's first general-purpose Linux
Microsoft’s in-house Linux, the distribution that grew out of CBL-Mariner, just hit public preview as a general-purpose cloud OS you can run on any Azure VM and coming soon to WSL.
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Java 21 VirtualThreads vs. Clojure Lazy Seqs
Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS ). Thanks to Anton Fonarev for link aggregation.
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Stop Wasting Connections, Use HTTP Keep-Alive
The latest tutorials, best practices, insights and customer stories on the Lob APIs, direct mail, and address verification.