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bcdc30b59a
The GetPodsUsingPVC function had O(N*M) complexity - for each PVC, it listed ALL pods in the namespace and iterated through each pod. With many PVCs and pods, this caused significant performance degradation (2+ seconds per PV in some cases). This change introduces a PVC-to-Pod cache that is built once per backup and reused for all PVC lookups, reducing complexity from O(N*M) to O(N+M). Changes: - Add PVCPodCache struct with thread-safe caching in podvolume pkg - Add NewVolumeHelperImplWithCache constructor for cache support - Build cache before backup item processing in backup.go - Add comprehensive unit tests for cache functionality - Graceful fallback to direct lookups if cache fails Fixes #9179 Signed-off-by: Shubham Pampattiwar <spampatt@redhat.com>