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* EC detection: build placement snapshot once per cycle, not per volume planECDestinations rebuilt the full ecbalancer snapshot (FromActiveTopology) for every eligible volume, and resolved each shard destination's address via ResolveServerAddress, which rebuilds the whole node map on every call. Both are O(volumes x topology) and made detection time out on large clusters (TestErasureCodingDetectionLargeTopology: 300k volumes hit the 2-minute deadline). Build the snapshot and the node-address map once per detection cycle and pass them in. planECDestinations now reserves the shards it assigns directly into the shared snapshot, so volumes planned later in the same cycle still see the reduced capacity (previously this was observed by rebuilding from ActiveTopology's pending tasks). Large-topology detection drops from a 120s timeout to ~3.5s. * Update weed/worker/tasks/erasure_coding/detection.go Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com> --------- Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>