Super HN

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121. The future of software engineering is SRE
When code gets cheap operational excellence wins. Anyone can build a greenfield demo, but it takes engineering to run a service.
122. Taming P99s in OpenFGA: How we built a self-tuning strategy planner
Discover how a self-tuning strategy planner using Thompson Sampling optimized OpenFGA performance and slashed tail latency in multi-tenant environments.
123. Maze Algorithms (2017)
124. Introduction to PostgreSQL Indexes
Who’s this for Basics How data is stored in disk How indexes speedup access to data Costs associated with indexes Disk Space Write operations Query planner Memory usage Types of Indexes Btree Hash BRIN GIN GiST & SP-GiST Conclusion Who’s this for This text is for developers that have an intuitive knowledge of what database indexes are, but don’t necessarily know how they work internaly, what are the tradeoffs associated with indexes, what are the types of indexes provided by postgres and how you can use some of its more advanced options to make them more optimized for your use case.
125. Building a Real-Time HN Display for $15
126. Hands-On with Two Apple Network Server Prototype ROMs
127. Environmentalists worry Google behind bid to control Oregon town's water
128. Video Games as Art
Video games are art, but a strange art: their essence is transformation of the player, not description to the player. This makes meaningful criticism nearly impossible—you can point at the moon, but it’s not the moon, and once someone sees it, they no longer need the pointing.
129. Typography on Pencils (2023)
It wouldn't be Pencil Day without a round up of our pencil typography photos. Check out our current stock of new & vintage pencils here.  Please do credit us if you use these images anywhere. Thank you.
130. France passes bill to ban social media use by under-15s
French politicians have passed a bill that will ban social media use by under-15s, a move championed by President Emmanuel Macron as a way to protect children from excessive screen time.
131. Spanish track was fractured before high-speed train disaster, report finds
The preliminary report into the crash that left 45 people dead finds evidence of a fracture more than two hours earlier.
132. Water 'Bankruptcy' Era Has Begun for Billions, Scientists Say
133. Scaling PostgreSQL to power 800M ChatGPT users
134. BirdyChat becomes first European chat app that is interoperable with WhatsApp
We are excited to share that BirdyChat is the first chat app in Europe that can exchange messages with WhatsApp under the Digital Markets Act. This is a big step forward for anyone using BirdyChat for work.
135. Nexphone-A phone that runs Android, Linux, and Windows?
136. A Ruby Regular Expression Engine
Kevin Newton
137. SFPark: Interactive map of SF parking regulations
138. Optimizing GPU Programs from Java Using Babylon and Hat
139. You have to know how tech companies work
140. Wind Chime Length Calculator
141. BU-808: How to Prolong Lithium-based Batteries (2023)
Manufacturers take a conservative approach and specify the life of Li-ion in most consumer products as being between 300 and 500 discharge/charge cycles.…
142. "People are going to stop and ask you, 'How can I help?' Let them."
Connie Sherburne lost her husband to a plane accident in 2020. A small bit of advice she got from an insurance company employee made a huge difference in her life for years after that.
143. We X-Rayed a Suspicious FTDI USB Cable
That cheapo cable you bought online? Probably a counterfeit. We x-rayed a suspicious cable to show you exactly what that means, and why counterfeits work worse and wear out faster.
144. Memory layout in Zig with formulas
I was recently encouraged to watch A Practical Guide to Applying Data Oriented Design (DoD) by Andrew Kelley, the creator of Zig1. Just 10 minutes into the talk, I was confronted with a skill I had never formally learned… the arithmetic behind memory layout of types. Zig is a modern, C-like programming language which offers a safer, more memory-explicit experience for systems programming, without sacrificing low-level control or C interoperability. Notably, Zig makes it straightforward to manage memory allocation by treating allocators as first-class values rather than hidden globals. Instead of relying on an implicit runtime or a process-wide allocator, you pass explicit allocator objects into the code that needs them. This makes ownership and lifetimes much clearer, encourages you to design APIs around who is responsible for allocating and freeing memory, and makes it easy to swap in custom allocation strategies (e.g., arenas, scratch, tracking, etc.). ↩
145. Let's Talk About Those Watches in 'Severance'
We spoke to the prop master, and uncovered them.
146. Small Kafka: Tansu and SQLite on a free t3.micro
Achieving 7000 msg/s (~6.7MB/s) with just 27MB of memory on a free t3.micro EC2 in AWS
147. QMD - Quick Markdown Search
mini cli search engine for your docs, knowledge bases, meeting notes, whatever. Tracking current sota approaches while being all local - tobi/qmd
148. An ultra-high-resolution map of (dark) matter
Ordinary matter—including particles such as protons and neutrons—accounts for only about one-sixth of all matter in the Universe. The rest is dark matter, which does not emit or absorb light but plays a fundamental role in galaxy and structure evolution. Because it interacts only through gravity, one of the most direct probes is weak gravitational lensing: the deflection of light from distant galaxies by intervening mass. Here we present an extremely detailed, wide-area weak-lensing mass map covering 0.77° × 0.70°, using high-resolution imaging from the James Webb Space Telescope as part of the COSMOS-Web survey. By measuring the shapes of 129 galaxies per square arcminute—many independently in the F115W and F150W bands—we achieve an angular resolution of $$1.00\pm 0.0{1}^{{\prime} }$$ . Our map has more than twice the resolution of earlier Hubble Space Telescope maps, revealing how dark and luminous matter co-evolve across filaments, clusters and underdensities. It traces mass features out to z ≈ 2, including the most distant structure at z ≈ 1.1. The sensitivity to high-redshift lensing constrains galaxy environments at the peak of cosmic star formation and sets a high-resolution benchmark for testing theories about the nature of dark matter and the formation of large-scale cosmic structure. JWST’s COSMOS-Web survey is used to create an ultra-high-detail dark matter map, revealing hidden filaments, clusters and distant structures. By tracing features out to z = 2, this map shows how dark and luminous matter build the cosmic web across cosmic time.
149. Ask HN: How to prevent Claude/GPT/Gemini from reinforcing your biases?
150. A Complete Guide to Neural Network Optimizers
Musings of a Deep Learning Enthusiast.