https://nalar.dev/tags/concurrency/ Recent content in Concurrency on Nalar Hugo en-us Tue, 01 Sep 2026 00:00:00 +0700 https://nalar.dev/bounded-concurrency-worker-pool-go/ Tue, 01 Sep 2026 00:00:00 +0700 https://nalar.dev/bounded-concurrency-worker-pool-go/ <p>Goroutines are cheap, but the resources they call are often not. Starting one goroutine for every item in a large batch can overwhelm a database connection pool, trigger API rate limits, exhaust file descriptors, or create avoidable memory pressure.</p> <p>Bounded concurrency solves this by allowing only a fixed number of operations to run at the same time. A worker pool is one of the simplest standard-library patterns for implementing that limit in Go.</p> https://nalar.dev/request-coalescing-in-go/ Tue, 01 Sep 2026 00:00:00 +0700 https://nalar.dev/request-coalescing-in-go/ <p>When many requests ask for the same expensive resource at the same time, running identical work for every caller can overload a database, API, or filesystem. A cache can help after a result exists, but it does not necessarily prevent several concurrent cache misses from triggering the same backend operation.</p> <p>Request coalescing solves a different problem: while one operation for a key is already running, later callers wait for that operation and share its result. After the operation finishes, the result is forgotten. The next request starts fresh work.</p>