Swift 6 turned working code into a compile error and iOS devs are furious
Everything was working perfectly fine in your application for multiple years. Then one day a simple configuration change of a flag resulted in over…
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Completion Is an Ownership Boundary
An async method can finish its useful work and still be holding lifecycle state that tells the rest of the system it is active. That sounds like a t…
How Java's Concurrency APIs Fit Together
A concurrency problem can begin with an ordinary requirement: let two independent operations make progress without forcing one to wait for the other…
Java 21 Virtual Threads: Is the Thread Pool Era Over?
Java 21 officially introduces virtual threads (Project Loom), making high-concurrency programming simpler than ever. What Are Virtual Threads Virtua…
The context you passed is not the context that cancels
Two failure modes, opposite in effect, same root cause. Both compile, and both are quiet in development. Failure one: the work dies with the request…
Virtual threads didn't scale your app. They just moved the crash to your database.
When Java 21 was released with virtual threads, everyone celebrated, including myself. Then someone's app fell over at 2AM. And the crash wasn't whe…
Goish: พอร์ตรันไทม์ของ Go ทั้งตัวลงใน no_std Rust
📅 เขียนเมื่อ: สิงหาคม 2026 | Goish (goish.cogentica.ai) ⚠️ โปรเจกต์เพิ่งเปิดตัว — รายละเอียด/เวอร์ชันอาจเปลี่ยนแปลง ตรวจสอบจาก GitHub ก่อนใช้งาน ถ้า…
Concurrent Resource Scheduler v1.2.3: Sharded Priority Heaps Under Concurrent Load
GitHub: https://github.com/phero20/concurrent-resource-scheduler Go documentation: https://pkg.go.dev/github.com/phero20/concurrent-resource-schedul…
I Built a Concurrent Resource Scheduler in Go Using Sharded Priority Heaps
Support on GitHub: github.com/phero20/concurrent-resource-scheduler (Give it a star if you find it useful!) View Docs: pkg.go.dev/github.com/phero20…
Mastering the Producer-Consumer Pattern in Java LLD: The Restaurant Kitchen
Mastering the Producer-Consumer Pattern in Java LLD: The Restaurant Kitchen The Producer-Consumer pattern is a staple in Java Machine Coding intervi…
Can an Interpreted Language Really Do Multithreading?
Can an Interpreted Language Really Do Multithreading? Python, the GIL, and the myths that surround it The Setup: It works, but it's "fake"? I built…
Stop Making Your Agent Wait: Branch Prediction for Tool Calls
Speculative tool execution guesses the next tool while the model is still reasoning, runs it in parallel, and hides the latency — discarding the gue…
Go 1.25 testing/synctest: No More Flaky Concurrent Tests
Three green tests locally, two red on CI. The outcome depends on how busy the build server is that day. This isn't a logic bug — it's a time.Sleep t…
Stop Using Round-Robin: High-Throughput Java Virtual Thread Routing with P2C
Stop Using Round-Robin: High-Throughput Java Virtual Thread Routing with P2C Virtual threads allow Java microservices to comfortably run 50,000 conc…
Thread Confinement in Java: Master High-Performance Concurrency in LLD Interviews
Thread Confinement in Java: Master High-Performance Concurrency in LLD Interviews In LLD and machine coding interviews, candidates often default to…
Share Memory by Communicating: When a Channel Beats a Mutex in Go
Book: The Complete Guide to Go Programming Also by me: Hexagonal Architecture in Go — the companion book in the Thinking in Go series My project: He…
Catching Goroutine Leaks in Go Tests With goleak
Book: The Complete Guide to Go Programming Also by me: Hexagonal Architecture in Go — the companion book in the Thinking in Go series My project: He…
singleflight in Go: Collapsing Duplicate Work Under Load
Book: The Complete Guide to Go Programming Also by me: Hexagonal Architecture in Go — the companion book in the Thinking in Go series My project: He…
Stop Guessing Your Cache Locality: Verify JEP 401 Value Class Flattening with JFR
Stop Guessing Your Cache Locality: Verify JEP 401 Value Class Flattening with JFR JEP 401 value classes are a massive win for memory density, but to…
Stop Parsing Raw Stack Traces: Debugging Virtual Thread Deadlocks with JDK 26 JSON Thread Dumps
Stop Parsing Raw Stack Traces: Debugging Virtual Thread Deadlocks with JDK 26 JSON Thread Dumps If you are still running jstack or grepping through…
Mitigating Race Conditions in Distributed Inventory Ledgers
When building a system that tracks highly volatile, mutable data across multiple distinct endpoints, data integrity becomes your highest priority. I…
Resources for Learning to Build Technologies from Scratch with Go: Books and Free Online Courses
Introduction to Building Technologies from Scratch with Go Building technologies from scratch using Go is more than a learning exercise—it’s a gatew…
retry-thread-pool: a retrying executor for Java
Originally published at adrijshikhar.dev . Most retry libraries wrap one call . Fine for a single flaky operation — but when you run a pool of tasks…
Race-Condition: How a Single SQL Line Eliminated 100 Lines of Retry and Lock Code
hat "rare" bug that looks intermittent but is actually deterministic. It is just waiting for your pods to scale. I recently dealt with a textbook co…
PHP Fibers in Production: 4 Real Cases Where They Beat curl_multi and Queues
Book: Decoupled PHP — Clean and Hexagonal Architecture for Applications That Outlive the Framework Also by me: Thinking in Go (2-book series) — Comp…
Distributed Lock Alternatives: 3 Methods Every System Architect
When building distributed systems or breaking down an existing monolithic system, managing concurrently accessed shared resources has always been a…
Rust Concurrency for AI Agents: Managing GPU Inference Slots
Rust Concurrency for AI Agents Five agents. One or two GPUs. Shared VRAM. The Architecture Hand-Rolled mpsc Channels Most agent frameworks use an ac…
SQLite and Concurrency: The Lockout Experienced at islistesi.com
SQLite and Concurrency: The Lockout Experienced at islistesi.com A few weeks ago, the SQLite database I use to ensure data consistency in a producti…
Ractors vs Fibers: Ruby Concurrency Without the Hand-Waving
Ruby has had a concurrency story for years. For most of that time, the story was "threads exist but the GIL means they don't give you parallelism fo…
The Document Number Is Reserved Before the PDF Exists
The hard part of document numbering is not incrementing an integer. It is deciding what happens when the integer is reserved, rendering starts, and…