https://prasadekke.com/blog/ Writing by Prasad Ekke on distributed systems, cloud infrastructure, performance engineering, and security platforms. en Tue, 29 Sep 2026 00:00:00 GMT https://levelup.gitconnected.com/channel-semaphore-vs-x-sync-semaphore-its-not-about-speed-3b6c334f0b6a https://levelup.gitconnected.com/channel-semaphore-vs-x-sync-semaphore-its-not-about-speed-3b6c334f0b6a Tue, 29 Sep 2026 00:00:00 GMT Benchmarking chan struct{} against x/sync/semaphore shows the performance folklore is wrong; the differences that matter are semantic. https://levelup.gitconnected.com/errgroup-cancels-less-than-you-think-10ee0fabc7b3 https://levelup.gitconnected.com/errgroup-cancels-less-than-you-think-10ee0fabc7b3 Tue, 22 Sep 2026 00:00:00 GMT errgroup.WithContext is a tiny API that keeps producing the same bugs. A look at its documented cancellation semantics, which are easy to assume rather than read. https://levelup.gitconnected.com/goleak-has-a-450-millisecond-attention-span-388ef7decf39 https://levelup.gitconnected.com/goleak-has-a-450-millisecond-attention-span-388ef7decf39 Tue, 15 Sep 2026 00:00:00 GMT Why a green goleak test suite can coexist with goroutine counts that climb all week in production, and the narrower question goleak actually answers. https://levelup.gitconnected.com/your-graceful-shutdown-probably-doesnt-drain-691d0aa7fd75 https://levelup.gitconnected.com/your-graceful-shutdown-probably-doesnt-drain-691d0aa7fd75 Wed, 09 Sep 2026 00:00:00 GMT srv.Shutdown can return nil while every deploy still spikes 502s. What Go's Shutdown actually promises, and what it leaves for you to handle. https://levelup.gitconnected.com/retries-can-make-outages-worse-c589e86bcfee https://levelup.gitconnected.com/retries-can-make-outages-worse-c589e86bcfee Tue, 25 Aug 2026 00:00:00 GMT Retries are one of the easiest resilience patterns to add and one of the easiest to get wrong, and a badly tuned retry can turn a blip into an outage. https://medium.com/gitconnected/the-difference-between-a-cache-and-a-lie-0579ef4789f5 https://medium.com/gitconnected/the-difference-between-a-cache-and-a-lie-0579ef4789f5 Wed, 19 Aug 2026 00:00:00 GMT A look at why caches are time-limited promises rather than sources of truth, and how explicit invalidation and failure handling keep them honest. https://medium.com/gitconnected/why-i-prefer-boring-caches-a08c0e11cfea https://medium.com/gitconnected/why-i-prefer-boring-caches-a08c0e11cfea Tue, 11 Aug 2026 00:00:00 GMT A case for simple, predictable caching strategies that degrade gracefully over clever optimizations that are hard to reason about. https://medium.com/gitconnected/determinism-is-a-core-contract-in-build-caching-2c9ede1ec948 https://medium.com/gitconnected/determinism-is-a-core-contract-in-build-caching-2c9ede1ec948 Tue, 04 Aug 2026 00:00:00 GMT A practical look at why deterministic build outputs are essential for reliable caching, and the common sources of nondeterminism to watch for. https://medium.com/gitconnected/remote-execution-explained-for-people-who-just-run-make-c5c767893e02 https://medium.com/gitconnected/remote-execution-explained-for-people-who-just-run-make-c5c767893e02 Tue, 28 Jul 2026 00:00:00 GMT A practical introduction to remote execution, modeling builds as DAGs of deterministic actions that can be cached and distributed across machines. https://medium.com/gitconnected/go-slice-initialization-gotchas-the-hole-creating-bug-i-keep-seeing-and-a-linter-that-catches-it-9e7e4673cefd https://medium.com/gitconnected/go-slice-initialization-gotchas-the-hole-creating-bug-i-keep-seeing-and-a-linter-that-catches-it-9e7e4673cefd Tue, 21 Jul 2026 00:00:00 GMT A look at a common Go bug from mixing make() with a non-zero length and append, and the makezero linter that catches it. https://medium.com/@prasad.ekke/why-i-always-specify-types-for-constants-in-go-and-name-the-unit-too-ae0f3d298e00 https://medium.com/@prasad.ekke/why-i-always-specify-types-for-constants-in-go-and-name-the-unit-too-ae0f3d298e00 Tue, 14 Jul 2026 00:00:00 GMT A practical note on making Go constants explicit, readable, and harder to misuse by naming both the type and the unit. https://medium.com/@prasad.ekke/container-aware-resource-management-in-go-the-problem-go-1-25s-fix-and-what-s-still-missing-211b2e3aeb76 https://medium.com/@prasad.ekke/container-aware-resource-management-in-go-the-problem-go-1-25s-fix-and-what-s-still-missing-211b2e3aeb76 Tue, 07 Jul 2026 00:00:00 GMT A practical look at Go resource management inside containers, the Go 1.25 improvements, and the gaps engineers still need to account for. https://medium.com/gitconnected/profiling-a-go-service-in-production-pprof-in-10-minutes-a46174e6ed24 https://medium.com/gitconnected/profiling-a-go-service-in-production-pprof-in-10-minutes-a46174e6ed24 Tue, 30 Jun 2026 00:00:00 GMT A practical guide to enabling pprof, collecting CPU and heap profiles, reading flame graphs, and debugging Go services under real load. https://medium.com/gitconnected/context-context-is-not-optional-a-practical-guide-to-cancellation-in-go-services-350342cd992a https://medium.com/gitconnected/context-context-is-not-optional-a-practical-guide-to-cancellation-in-go-services-350342cd992a Tue, 23 Jun 2026 00:00:00 GMT A practical guide to using context.Context as part of service design, cancellation, deadlines, and shutdown behavior in Go. https://medium.com/gitconnected/go-interfaces-why-less-is-almost-always-more-a7a2cbf3ec34 https://medium.com/gitconnected/go-interfaces-why-less-is-almost-always-more-a7a2cbf3ec34 Wed, 17 Jun 2026 00:00:00 GMT A short note on keeping Go interfaces small, behavior-focused, and easier to test and evolve. https://medium.com/@prasad.ekke/three-go-concurrency-mistakes-i-see-in-almost-every-worker-pool-480a7de51c43 https://medium.com/@prasad.ekke/three-go-concurrency-mistakes-i-see-in-almost-every-worker-pool-480a7de51c43 Tue, 16 Jun 2026 00:00:00 GMT A practical look at worker-pool mistakes around cancellation, channel ownership, and shutdown paths.