I Chased uWebSockets—and Found a 14-Byte Performance Cliff
Building ramjet-ws-js: a Rust-backed WebSocket path for Node.js that wins where it matters, admits where it loses, and survived 584 million verified r…
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"Your GitOps Hub Will Become the Bottleneck Long Before Cluster Count Tells You"
Your GitOps Hub Will Become the Bottleneck Long Before Cluster Count Tells You GitOps hub bottlenecks are usually predicted more accurately by watched…
TimescaleDB 2.27 Added Bloom Filters to UPDATE and DELETE. Your EXPLAIN Won't Tell You If They Work Unless You Know These Counters.
TimescaleDB 2.27, released May 12 2026, extends bloom-filter batch pruning from reads to writes. UPDATE, DELETE, and UPSERT against compressed columns…
Correctness Has a Price: We Benchmarked Fair Leaderboards
Engineering posts often end with: The new design is correct, scalable, and fast. Fast compared with what? When we changed Podium so tied players rank …
Mastering Python Futures: From Basic Submissions to Event-Driven Concurrency
When building modern Python applications—whether scraping web pages, fetching data from external APIs, or querying databases—IO-bound operations often…
Optimizing API Latency in C# .NET Applications
API latency plays a crucial role in performance and user experience. High latency frustrates users, reduces scalability, and increases infrastructure …
Magento 2 Admin Grid Performance Optimization: Speed Up Your Backend
Your frontend might be lightning-fast, but if your admin grids take 8+ seconds to load , your team is bleeding hours every week. Order grids, product …
Why We Built Bitweave: Sub-Millisecond Hybrid Retrieval in <1.1 MB RSS Memory
When building local RAG (Retrieval-Augmented Generation) applications, edge agents, or serverless AI pipelines, developers usually hit a wall with sta…
Part 3: The Angular Change Detection Mistakes That Make Large Apps Feel Slow
Part 3 of Angular in Production series When an Angular application is samll, change detection is something most developers rarely think about. And hon…
10 Next.js Performance Mistakes That Slow Down Production Apps
A Next.js application can feel fast during development and still become painfully slow after deployment. Local development usually runs with a small d…
BenchmarkGate, Part 2: Why a Baseline Isn't Enough
In part one , I introduced BenchmarkGate — a local-first performance regression gate for BenchmarkDotNet. v0.1.0-alpha.1 could do one thing: compare a…
React Compiler in Production: Adoption, Measurement & Safe Rollout
Start with a user-facing performance baseline The compiler optimizes how React derives and reuses UI, so its value is most visible in interfaces that …
Fast at Lunch. Slow at Scale: Why Your App Gets Slow When Real Data Arrives
A page that feels instant with a few users can become painfully slow when your business grows. The code hasn’t changed. The server hasn’t changed. The…
How We Cut Our Homepage TTFB from 800ms to Under 200ms (and Refreshed the Hero While We Were At It)
How We Cut Our Homepage TTFB from 800ms to Under 200ms (and Refreshed the Hero While We Were At It) Our homepage was fine. It loaded. It had words on …
How redis-packhash Helps You Leverage Listpack Hashes in Redis
In my earlier post , I showed that storing a million small values as Redis keys is a waste of memory. It's because every key has its own overhead. To …
$request_time Looks Fast, But Users Say It''s Slow: Breaking nginx Latency into 4 Parts
Your nginx $request_time looks fine in the dashboard — p95 is 120ms, totally reasonable. But users keep reporting that things "occasionally freeze." Y…
KV Cache Quantization: I Stretched Qwen 35B's Context 8 on 12GB VRAM
600 MiB of headroom My RTX 4070 was running Qwen 35B beautifully after the --cpu-moe trick from a previous run. The tokens/sec were where I wanted the…
React Performance Optimization Techniques That Actually Work
Performance optimization in React is often surrounded by myths. Developers routinely wrap every single component in React.memo , wrap every function i…
Почему Rust завоевывает сердца разработчиков
программирование #rust #системноепрограммирование #безопасность Rust — это современный язык системного программирования, который изначально создавался…
LiteSpeed vs Nginx for WordPress: 3 months of production benchmarks
TL;DR Ran LiteSpeed Enterprise (LSWS) and Nginx side-by-side on identical VPS instances for 3 months, hosting the same 12 WordPress sites on each. Lit…
We Got the Prompt Cache Working. Our Pipeline Got Slower.
"You're spawning a fresh codex exec for every single call? Just run the app-server and reuse a thread. The prompt cache alone will pay for it." That s…
Stress-testing my Multi-LLM engine: 93 chunks, 8 models, and one "Insufficient Balance" error.
Last week, I decided to push my consensus engine, NexaVerify , to its absolute limits. I wanted to see if my architecture could handle a massive paral…
React Native List Performance — ScrollView, FlatList, SectionList, FlashList
Your feed scrolls fine with 20 items. Ship 2,000 and the UI starts hitching, memory climbs, and “just wrap it in a ScrollView ” becomes the bug report…
Performance Tuning Before Launch
In A Production Security Checklist , I walked through what to lock down before opening the doors to real users. Security is a pass/fail gate: you eith…
Redis Data Structures: An Overview
The reason Redis solves so many problems is that it isn't one thing, it's a collection of data structures, each with commands tuned for a specific acc…
s3fifo 1.0: Zero-Allocation S3-FIFO Cache for Node.js is Ready for Production
Disclaimer: As a non-native English speaker, I used AI to help structure and polish this article. A few dayss ago, I shared Implementing a Zero-Alloca…
Every Word I Say Gets Tokenized. This Library Does It 1000x Faster.
Every time you send me a message, it goes through a tokenizer before I see it. Every word I write back goes through one after I'm done. I don't mean t…
OpenRouter vs Vercel vs LLMGateway Performance
Every AI gateway adds a hop between your app and the model. The question that matters is what that hop costs at the moment your user is staring at a b…
The circular_buffer trap: how a 'faster' data structure spiked my CPU from 2% to 25%
There's a special kind of bug that only shows up after you've made your code "better." You swap in the data structure everyone agrees is more efficien…
Why Compressing an Image to Exactly 50KB Is Harder Than It Sounds
Ever wondered why one image hits 50KB at 80% quality while another is still 200KB at 20%? The answer isn't your compression library — it's how JPEG co…