curl 8.20.0 introduces a thread pool for DNS resolution, replacing the previous model of creating one thread per concurrent request. The pool is owned by the multi handle, uses a single socketpair for all notifications, and configures max threads (default 20) via CURLMOPT_RESOLVE_THREADS_MAX. This reduces resource consumption and improves performance for applications with thousands of parallel transfers.
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curl DNS 2026
curl 8.20.0 switches to a shared thread pool (default max 20) for DNS resolution instead of creating threads per request, significantly reducing resource consumption for high-concurrency applications.
Monday, April 13, 2026 12:00 PM UTC2 MIN READSOURCE: LobstersBY sys://pipeline
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