do not run nci calculation if data has not changed.
do not run nci calculation if data has not changed.

FlowForwarding/loom,marcsugiyama/loom,FlowForwarding/loom,marcsugiyama/loom,marcsugiyama/loom,FlowForwarding/loom,sigstop/loomoe,sigstop/loomoe,sigstop/loomoe,FlowForwarding/loom,marcsugiyama/loom