1 files changed, 3 insertions, 0 deletions
diff --git a/preprocess.js b/preprocess.js
index 831e3cf..904d6be 100644
--- a/preprocess.js
+++ b/preprocess.js
@@ -74,5 +74,8 @@ function preprocess(data, options) {
     data.edges.map(function (link) {
         link.source = userIds_indices[link.source];
         link.target = userIds_indices[link.target];
+        // for faster lookup, store neighboring nodes per node
+        data.nodes[link.source].related.push(link.target);
+        data.nodes[link.target].related.push(link.source);
     });
 }