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ExternalSoftware Engineering
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What Actually Happens When You UPDATE a Row in PostgreSQL?

Most developers think of a PostgreSQL table like this: 1 | 25 Then we run: UPDATE users The obvious mental model is: 25 → 30 But PostgreSQL doesn't simply overwrite the old value. To understand what actually happens, we need to look at how PostgreSQL stores rows and how MVCC (Multi-Version Concurrency Control) works. Tables are stored as pages PostgreSQL stores table data in fixed-size pages. The usual page size is 8 KB. You can roughly imagine a table as: users ┌─────────────────┐ Each page ca

postgresprogrammingbackend
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ExternalSoftware Engineering
DEV Community

AI Can Find the Failure. Who Decides What the Fix Should Be?

AI is changing accessibility remediation fast. It can find common accessibility failures, explain them, and increasingly write the fix. That's real, and it's useful. But finding a failure is not the same as deciding what the fix should be. The gap is easy to miss because it doesn't always produce an obviously wrong answer. Sometimes it produces a confident, plausible fix that is wrong for reasons that only become apparent when you understand the interaction in context. I recently worked through

a11yaiwebdev
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ExternalSoftware Engineering
DEV Community

How VIDRAFT Hit 510.58 TPS on Gemma-4: A Deep Dive into "The First Gemma Challenge" Win

How VIDRAFT Hit 510.58 TPS on Gemma-4: A Deep Dive into "The First Gemma Challenge" Win TL;DR: VIDRAFT topped "The First Gemma Challenge" leaderboard with a verified 510.58 tokens-per-second (TPS) score on google/gemma-4-E4B-it using a single NVIDIA A10G GPU — while a rival submission posted a faster raw number but failed the quality gate. This post breaks down the public configuration choices that made it possible, and what engineers can steal for their own inference tuning work. "The First

llminferenceoptimizagemma4benchmarktokenspersecond
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ExternalSoftware Engineering
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I built a content recommender as a graph, and it found similarities I wasn't looking for

Most beginner recommendation projects are a dictionary lookup. You type interestingly different. I wanted the second thing. So I modelled the catalogue as a weighted The project is called CreatorRoute. It recommends short-form content Forty rows of short-form videos, hand-written, five attributes each: id,title,niche,hook_type,length,editing_style,cta_type 4,Stop posting at 9am,marketing,contrarian,short,jump-cut,comment 23,Stop using this transition,editing,contrarian,short,jump-cut,comment Re

pythonalgorithmsbeginners
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ExternalSoftware Engineering
DEV Community

Frontend Challenge: Comfort Food Edition - Lumina Dining

This is a submission for Frontend Challenge - Comfort Food Edition, Perfect Landing I built a landing page with a restaurant theme showing menu, reservation and about the restaurant Here's the live demo: https://lumina-dining-mocha.vercel.app/ I used Stitch to create a design for the landing page. It was built using Next, with Vanilla CSS. It was exciting to build, and I hope to build a landing page for a beach resort next.

devchallengefrontendchallengewebdev
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ExternalSoftware Engineering
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I built PulseVault to monitor websites. Looking for feedback.

Hi everyone, I've been building PulseVault, a website monitoring platform that helps website owners detect downtime, SSL issues, broken forms, and performance problems. I recently finished the landing page and I'm looking for honest feedback. What would make a tool like this useful to you? What features would you expect from a website monitoring platform? I'd appreciate any feedback. pulsevault.website

buildinpublicmonitoringsaas
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ExternalSoftware Engineering
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Sitemaps Are Free SEO — Here's the Vite Plugin That Generates Yours

The Problem Every static site I've shipped has gone through the same ritual: build the site, then manually write a sitemap.xml, forget to update it when a route changes, and discover a month later that Google indexed half my pages. Sitemaps are boring, so they get done wrong. @3ni8ma/vite-plugin-sitemap generates sitemap.xml (and robots.txt, if you want it) as part of your Vite build. You declare your routes once, and every build emits a fresh, correct sitemap. // vite.config.ts import { defin

viteseojavascript
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