diff --git a/utils/ids.js b/utils/ids.js
index 44b0bf7..44aef84 100644
--- a/utils/ids.js
+++ b/utils/ids.js
@@ -59,16 +59,17 @@ function LogId (id, subj) {
 }
 
 function AddSubjToList (list, subj) {
-  if (list.indexOf(subj) === -1) {
-    list.push(subj)
+  if (!list[subj]) {
+    list[subj] = 0
   }
+  list[subj]++
 }
 
 function Inc (value, subj) {
   if (data[value] === undefined) {
     data[value] = {
       count: 0,
-      subjs: []
+      subjs: {}
     }
   }
   data[value].count++
@@ -82,7 +83,7 @@ function AddVisitStat (name, subj) {
   if (vData[now][name] === undefined) {
     vData[now][name] = {
       count: 0,
-      subjs: []
+      subjs: {}
     }
   }
   vData[now][name].count++