https://nalar.dev/tags/waitgroup/ Recent content in WaitGroup on Nalar Hugo en-us Wed, 16 Sep 2026 00:00:00 +0700 https://nalar.dev/go-waitgroup-reuse-requires-completed-wait-boundaries/ Wed, 16 Sep 2026 00:00:00 +0700 https://nalar.dev/go-waitgroup-reuse-requires-completed-wait-boundaries/ <p>A <code>sync.WaitGroup</code> can be reused after a wait phase completes, but a new independent task set cannot begin while calls to <code>Wait</code> from the prior phase are still active. The boundary is the return of every earlier <code>Wait</code>, not merely the instant at which the internal task counter reaches zero.</p> <p>This constraint matters when one <code>WaitGroup</code> instance is retained across batches, epochs, request waves, or repeated coordination cycles. Reuse is supported, but phases must not overlap at the zero-to-positive counter transition.</p>