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News
Scaling Event-Driven APIs: Real-Time WebSockets and Redis Pub/Sub for High-Concurrency Apps
7+ hour, 48+ min ago (480+ words) From a business perspective, system instability during peak usage events directly damages user retention, degrades brand trust, and triggers SLA violations. For e-commerce, financial platforms, and real-time gaming, a latency spike or dropped connection state can result in direct financial…...
When a Zero-Parameter Cache Overtakes a Transformer
10+ hour, 23+ min ago (574+ words) The question this series exists to answer, put in a form that can be measured: a transformer sees a fixed 64-token window, a count table over the current document sees the whole document, and as documents get longer, how much…...
The database connection pool was configured with 50 connections, so why did the 20th request time…
14+ hour ago (30+ words) The database connection pool was configured with 50 connections, so why did the 20th request time out? Understanding how parallel database queries inside a single HTTP request can exhaust your …...
Our users’ phones were the backup: rebuilding a lost database from app caches
14+ hour, 47+ min ago (223+ words) How expired cache entries on readers’ devices, server logs, and a year-old dump were merged back into MongoDB without …...
Remote Chat Failover Needs a Tab-Stop Origin Banner, Not a Skeleton Overlay
20+ hour, 16+ min ago (999+ words) I was halfway through a keyboard-only pass on a streaming chat when the local path died. A skeleton overlay covered the composer, my focus jumped, and tokens started arriving from somewhere else. Did the interface tell me those tokens had…...
Prompt Caching: Why cache_control Writes But Never Reads
20+ hour, 31+ min ago (457+ words) I turned on prompt caching for an agent loop that resends a 12K-token system prompt on every turn. Obvious win, right? Input tokens are the whole bill in a tool loop. The bill went up. Not a little. Roughly a…...
Postgres for everything hits a wall the moment dashboards get concurrent
1+ day, 3+ hour ago (754+ words) I used to say, "Just use Postgres." After that, our dashboards became concurrent, and the read replica we quickly added to offload some of the pressure from the main database began overheating instead. There is a reassuring notion that Postgres…...
LRU Cache in PHP 8.5 for Identity Map: 13+ Million Ops/Sec
1+ day, 4+ hour ago (25+ words) An LRU cache in PHP is one of those problems everyone and their dog has already solved a dozen times... Tagged with php, laravel, webdev....
Memory efficiency: bytes per key
1+ day, 5+ hour ago (22+ words) Part 5 of 7 · ← Latency under load · Next: Operational simplicity → Part 5. The shortest post in... Tagged with redis, database, performance, benchmarking....
"EFFluentify: Convert EF Core Data Annotations to Fluent API in one command"
1+ day, 14+ hour ago (296+ words) One of my dreams when I started in software development was to build something like #include — a tool that other developers like me could actually reach for in their own projects. Now I have one. It's called EFFluentify, and this…...