Три раза ALLOW: в ERP оказалось 120 вместо разрешённых 100
Человек разрешил workflow заказать не больше 100 единиц товара. Три запроса по 40 прошли через слой авторизации и получили ALLOW. В ERP в итоге оказ…
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Thread-Safe Counter in Java: Fix Your First Concurrency Bug in Machine Coding
Thread-Safe Counter in Java: Fix Your First Concurrency Bug in Machine Coding During high-pressure machine coding interviews, seemingly trivial buil…
Managing Goroutine Lifecycle and Context Cancellation in Web Servers: Effective Strategies for Control
Introduction to Goroutines in Web Servers Goroutines are the backbone of Go’s concurrency model, acting as lightweight threads managed by the Go run…
Race Conditions in File and State Transitions: Why a Lock on One Step Is Not a Control
Race Conditions in File and State Transitions: Why a Lock on One Step Is Not a Control Concurrency bugs live in the gap between deciding and doing.…
Kotlin Coroutines vs Java Virtual Threads: A Comprehensive Comparison for Modern Backend Development
Kotlin Coroutines vs Java Virtual Threads: A Comprehensive Comparison for Modern Backend Development Introduction: The Concurrency Evolution The lan…
Take it out of the map: keeping a shared session store lock-free during slow work
An SSH client keeps every live session in a shared map behind a lock. Holding it through a slow handshake froze every other session — here's the Rus…
Swift search: cancellation needs an ownership check
Robin Winters · October 2, 2026 · Educational example prepared with coding-assistant support Search often looks simple until two requests finish in…
Share State Across Dart Isolates Without Losing Your Mind: Enter shared_map
This is Part 3 of the Dart and Flutter series—practical guides, architectural deep dives, and hard-earned engineering lessons from the field. Each a…
Когда atomic действительно быстрее Mutex
Привет, Хабр! Эта статья посвящается важной теме работы в многопоточной среде. Для безопасной работы с одним ресурсом из разных горутин разработчик…
Store Load Reordering: x86 vs ARM64, and the Bug Intel Was Hiding
Here is a bug report that keeps recurring, in different words, every time a team moves to ARM: "the same code works on our Intel CI and on the devel…
Function coloring is real and pretending context propagation isn't infection
Someone recently attempted to make the bold claim that function color isn't a real phenomenon. Unsurprisingly, the internet had a field day with tha…
Why Your Counter Shows 847 Instead of 1000 (Race Conditions, Explained)
Two threads each increment a shared counter 1,000 times. You expect 2,000. You run it — and get 1,847. Where did the missing increments go? I animat…
Java Concurrency: Threads
Why Do We Need Threads? Imagine you are running a restaurant with only one waiter. A customer places an order. The waiter takes the order to the kit…
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…
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…
Как мы заменили 30-минутный polling на IMAP IDLE и построили маленькую распределённую систему
Когда-то наш почтовый загрузчик был обычным методом с @Scheduled . Раз в 30 минут он подключался к ящикам, искал новые вложения и запускал их обрабо…
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…
Как сломать Swift Concurrency
Нужно выполнять асинхронные операции, поддерживать многозадачность в приложении? Async/await к вашим услугам - просто и приятно. Кооперативный пул э…