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What Unsustainable Growth Looks Like: Herbalife, Groupon, and More
Sometimes growth hides the fact that a business is on the verge of failure. Here's how.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 80,938 posts.
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Microsoft confirms Exchange Year 2022 problem
[German]Exchange servers (on-premises) have had woldwide a Year 2022 problem since January 1 (00:00 UTC), because mails are no longer transported due to a “date error”. Meanwhile…
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My VM is lighter and safer than your container
My VM is lighter (and safer) than your container Manco et al., SOSP’17 Can we have the improved isolation of VMs, with the efficiency of containers? In today’s paper choice the authors investigate …
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When ‘he’ll be kept on payroll, somewhere’ is where you are
On August 31, 2015, I started a Ph.D. in cryptography at TU Eindhoven, working with Tanja Lange and Dan Bernstein. On December 2, 2016, I…
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If you care about user privacy, don’t use Facebook JavaScript SDK
With email aliases , you can be anonymous online and protect your inbox against spams and phishing.
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PyPy 5.1 released
We have released PyPy 5.1, about a month after PyPy 5.0. This release includes more improvement to warmup time and memory requirements,...
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A treasury of Zork maps
Yesterday a Reddit link started going around the IF circles: "Wait," I thought, "haven't I seen that map before?" No, I had not. But I sort of had? Then I looked through my collection of Zork maps. Then I realized, oh no, I have a collection ...
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Cancellations in async Rust
Correctness in the face of cancellations: a written version of my talk at RustConf 2025.
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Figma AI
We’re introducing a suite of AI-powered features to help you push past creative blocks and bring your best ideas to life.
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3px of padding makes all the difference in the world
I'm sorry for rageskitching about Facebook, but I can't help it. I've seen this bug too many times and I would really like someone with commit access to the Facebook CSS to fix it. ...
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Wikivoyage has disappeared from DuckDuckGo
Update (2021-10-31): DuckDuckGo now includes results for Wikivoyage again, as do Bing and Yahoo. I have been planning a long due vacation and I was doing some research into the places I wanted to visit. My goto travel guide is Wikivoyage: it’s well organised, text-heavy (instead of slideshow-heavy alternatives) and…
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Comparing HTTP/3 vs. HTTP/2 Performance
We announced support for HTTP/3, the successor to HTTP/2, during Cloudflare’s birthday week last year. Our goal is and has always been to help build a better Internet. Even though HTTP/3 is still in draft status, we've seen a lot of interest from our users.
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The Need for a Digital Geneva Convention
YouTube Video
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Lost in Math
Sabine Hossenfelder’s new book Lost in Math should be starting to appear in bookstores around now. It’s very good and you should get a copy. I hope that the book will receive a lot of a…
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Ruby delights built into the language
No Gems Needed
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Compressing Icelandic name declension patterns into a 3.27 kB trie
How I used a compressed trie data structure to encode Icelandic declension data.
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How to Hire
After startups raise money, their next biggest problem becomes hiring. It turns out it’s both really hard and really important to hire good people; in fact, it’s probably the most important thing...
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Introducing Preemptible GPUs
In May 2015, Google Cloud introduced Preemptible VM instances to dramatically change how you think about (and pay for) computational resources for high-throughput batch computing, machine learning, scientific and technical workloads. Then last year, we introduced lower pricing for Local SSDs attached to Preemptible…
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ssh whoami.filippo.io
I updated the whoami.filippo.io dataset! I explain how it works, and how I fetched the new data.
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Web Scraping 101 with Python
A beginner's guide to getting started with web scraping using Python and BeautifulSoup.
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Bloom Filters
The original motivation for the creation of Bloom filters is efficient set membership, using a probabilistic approach to significantly reduce the time and space required to reject items that are not members in a certain set.
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I exploited TLS-SNI-01 issuing Let's Encrypt SSL-certs for any domain (2018)
The original research reports on security issues found in ACME TLS-SNI-01 which caused Let's Encypt to sunset it.
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Breaking a large AWS spend into understandable pieces
Explore technical topics, solutions, and resources for building with Twilio – and beyond.
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WebGPU is now available on Android
Support WebGPU on Android, use of DXC for shader compilation, timestamp queries in compute and render passes, default entry points to shader modules, support display-p3 as GPUExternalTexture color space, memory heaps info, and more.
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Gleam v1.9
News post: Gleam v1.9.0 released