DEV Community • 2026-04-28 04:57

WinOLS Explained: The Ultimate ECU Tuning Software for Beginners and Professionals

WinOLS Explained: Features, Workflow, and How to Get Started with ECU Tuning ECU tuning has become increasingly data driven, and having the right tools is essential for working with modern engine control systems. One of the most widely used software solutions in this space is WinOLS, developed by EVC Electronic. In this article, we’ll go through what WinOLS is, how it works, and how beginners ca...

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6m read
DEV Community • 2026-04-28 04:54

ECR image layers thực ra lưu trên S3 — và 4 bài học khác từ buổi audit AWS cắt $4,440/năm

Cắt ~$4,440/năm chi phí AWS — 5 bài học từ 1 buổi audit Mình vừa làm xong, thấy có vài thứ hay mà AWS docs không nói rõ. Share lại đầy đủ context để ai gặp tình huống tương tự đỡ phải mò như mình. Kết quả: ~$374/tháng tiết kiệm = ~$4,440/năm, hết khoảng 5 giờ làm việc. TL;DR Optimization Saving/tháng Effort Tạo S3 Gateway Endpoint cắt NAT data ~$196 5 phút Migrate...

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8m read
The Jupyter notebook bug that only crashes for other people
DEV Community • 2026-04-28 04:53

The Jupyter notebook bug that only crashes for other people

Cell 0 uses df. Cell 1 defines df. Notebook works for you because your kernel ran the cells in some other order and the variable's still in memory. You commit. Someone clones the repo, hits Restart and Run All, dies on cell 0. Standard Python linters can't catch this. ruff, flake8, mypy operate on one source file at a time. A notebook is N cells whose execution order in your kernel may have noth...

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4m read
Why We're Done Recommending WordPress to Small Business Clients
DEV Community • 2026-04-28 04:49

Why We're Done Recommending WordPress to Small Business Clients

WordPress served a purpose. But for most small business marketing sites, the overhead isn't justified by the use case. Here's the honest accounting of what running WordPress for client sites actually costs — and what we use instead. The call that finally changed our mind It's 11:15 on a Tuesday night. A client — a small physiotherapy practice, five staff, a website they're proud of —...

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6m read
DEV Community • 2026-04-28 04:48

An AI Tool Had OAuth to Their Whole Google Workspace. Then Vercel Got Breached.

A Vercel employee signed up for an AI tool. They clicked Allow All on the OAuth consent screen. Three weeks later, customer environment variables were sitting on a hacker's drive with a $2 million asking price. The tool was Context.ai, an enterprise AI platform that builds agents trained on company knowledge. The breach did not start at Vercel. It started two layers underneath, at Context.ai, whe...

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7m read
DEV Community • 2026-04-28 04:48

Why AI-generated fonts don't work in game engines (and the BMFont gap)

Our studio's designer kept running into the same problem: she'd generate a beautiful pixel-art font using an AI image tool, but Godot (and Unity, Phaser, LibGDX) wouldn't accept it. The reason is a format mismatch that trips up a lot of indie developers. What game engines actually need Most game engines use BMFont format for bitmap fonts — a standard originally from AngelCode's Bitmap...

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2m read
Building a Rolling-Baseline HTTP Anomaly Detector (No Fail2Ban)
DEV Community • 2026-04-28 04:46

Building a Rolling-Baseline HTTP Anomaly Detector (No Fail2Ban)

Every VPS running a public web app gets hit with traffic it didn't ask for, from scrapers, brute-force login attempts, or just someone's misconfigured bot hammering the same endpoint every second. Most tutorials say "install Fail2Ban and move on." But what if you want to understand the traffic before you block it? What if you need thresholds that adapt to your actual load instead of a hardcoded "5...

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7m read
DEV Community • 2026-04-28 04:45

GitHub Copilot Switches to Usage-Based Billing on June 1. The Token Tab Came Due.

The receipt landed in my GitHub inbox on a Monday morning. Subject: important changes to your Copilot plan. Body: starting June 1, every Copilot subscription pays a metered tab, not a flat fee. The Pro tier still costs ten dollars, but ten dollars now buys you ten dollars in AI credits, and a single agent session against Claude Opus can burn that in one run. I published a piece last week call...

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7m read
DEV Community • 2026-04-28 04:44

I Was Editing the Same Word Again and Again… So I Built This

🚨 The Problem That Didn’t Look Big (But Was) I was working on a piece of content. And I noticed something small: I used the wrong word. So I fixed it. Then I saw it again… And again… And again… Same mistake. Everywhere. 😐 What I Ended Up Doing You already know this pain: 👉 Scroll → Find → Edit 👉 Scroll → Find → Edit 👉 Scroll → Find → Edit Over and over. At some po...

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Product Hunt — The best new products, every day • 2026-04-28 04:44

Bitgrain

Design studio lighter than Figma & more flexible than Canva Discussion | Link

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DEV Community • 2026-04-28 04:38

How to Optimize SEO for React Apps Fast

I Spent 3 Hours Debugging Why Google Couldn't See My React App. The Fix Was 4 Lines of Code. Here's the frustrating truth about SEO for React apps: Google's crawler doesn't wait around for JavaScript to execute. It hits your URL, gets a <div id="root"></div>, and moves on. Your beautifully crafted product page? Invisible. Your carefully researched meta descriptions? Never re...

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5m read
DEV Community • 2026-04-28 04:35

What is React memo? How to improve React performance

React memo is a powerful feature that improves the performance of your React applications by letting you skip the re-rendering of components that haven't changed. This article explains how React memo works and how to use it. It also includes use cases and code examples that you can adapt for use in your own React code to make sure that your applications are as fast and efficient as possible. ...

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9m read
Hacker News: Front Page • 2026-04-28 04:32

San Francisco, AI capital of the world, is an economic laggard

Article URL: https://www.economist.com/finance-and-economics/2026/04/26/san-francisco-ai-capital-of-the-world-is-an-economic-laggard Comments URL: https://news.ycombinator.com/item?id=47930483 Points: 3 # Comments: 0

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DEV Community • 2026-04-28 04:31

Your AWS Cognito Emails Are Going to Spam — Here Is How to Fix It Step by Step

A beginner-friendly guide to setting up SPF, DKIM, DMARC, Amazon SES, and custom email templates so your emails actually reach the inbox Who This Guide Is For If you are building an app on AWS and using Cognito to handle user sign-up and login, you have probably noticed that Cognito sends emails automatically — a verification email when someone signs up, and a password reset ...

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9m read
Islamic Hijri Calendar Package
DEV Community • 2026-04-28 04:30

Islamic Hijri Calendar Package

Introduction Introducing our Islamic Hijri Calendar Package for displaying most fully featured dates in Arabic and English numerals. In this solution, customers can easily notice the month’s name in Hijri, with a year and move months without any hassle. Today, I am going to introduce the Islamic Hijri Calendar Package, which is a versatile, easy-to-use Flutter package that has the ability to sho...

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3m read
DEV Community • 2026-04-28 04:30

I Spent Six Months Chasing Core Web Vitals. Here’s What Actually Moved the Needle.

I Spent Six Months Chasing Core Web Vitals. Here's What Actually Moved the Needle. A field guide to LCP, INP, and CLS that skips the theory and gets to what breaks in production. Our dashboard said green. Our users said otherwise. For the better part of a year, we shipped features, ran Lighthouse locally, watched scores float between 92 and 98, and patted ourselves on the back. The...

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8m read
DEV Community • 2026-04-28 04:23

Benchmark: AWS Graviton5 vs. Intel Xeon 6th Gen for PostgreSQL 17 OLTP Workloads

AWS Graviton5 delivers 42% higher PostgreSQL 17 OLTP throughput per dollar than Intel Xeon 6th Gen, but only if you tune your vacuum and shared buffers correctly—here’s the benchmark data to prove it. 📡 Hacker News Top Stories Right Now Talkie: a 13B vintage language model from 1930 (154 points) Microsoft and OpenAI end their exclusive and revenue-sharing deal (790 points) Integ...

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18m read
Replacing Playwright's hardcoded VP8 encoder: a deep dive into page.screencast
DEV Community • 2026-04-28 04:19

Replacing Playwright's hardcoded VP8 encoder: a deep dive into page.screencast

If you've ever recorded a Playwright session of a text-heavy page — a code editor, a font preview, anything with crisp glyphs — and the output looked like it was filmed through a screen door, you've met Playwright's recordVideo. The artifacts are not a CDP problem. They're not a frame-rate problem. They are an encoder choice problem, and the encoder is hardcoded. This post is about replacing it w...

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9m read
DEV Community • 2026-04-28 04:18

How AI Penetration Testing Helps Prevent Adversarial Attacks and Data Poisoning

Artificial intelligence and machine learning systems are now embedded in critical business processes, from fraud detection and healthcare diagnostics to recommendation engines and autonomous systems. As adoption grows, so do the risks associated with these technologies. Unlike traditional software, AI systems rely heavily on data and complex models, making them vulnerable to unique attack vectors ...

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7m read
The Real Cost of Silent Data Pipeline Failures
DEV Community • 2026-04-28 04:18

The Real Cost of Silent Data Pipeline Failures

A loud failure - a crash, an error email, an alert firing at 3am - is a recoverable problem. You know something broke, you know when it broke, and you can investigate. A silent failure is different. The pipeline runs. No errors are logged. No alerts fire. The data is wrong, or incomplete, or stale, and nobody knows until someone notices that the numbers don't add up. At that point, the first ques...

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