diff --git a/modules/comment.module b/modules/comment.module
index 4f991b70612..88c2ee7c96b 100644
--- a/modules/comment.module
+++ b/modules/comment.module
@@ -1319,13 +1319,24 @@ function comment_settings($mode, $order, $threshold, $comments_per_page) {
 }
 
 function comment_num_all($nid) {
-  $comment = db_fetch_object(db_query("SELECT COUNT(c.nid) AS number FROM node n LEFT JOIN comments c ON n.nid = c.nid WHERE n.nid = '%d' AND c.status = 0 GROUP BY n.nid", $nid));
-  return $comment->number ? $comment->number : 0;
+  static $cache;
+
+  if (empty($cache[$nid])) {
+    $comment = db_fetch_object(db_query("SELECT COUNT(c.nid) AS number FROM node n LEFT JOIN comments c ON n.nid = c.nid WHERE n.nid = '%d' AND c.status = 0 GROUP BY n.nid", $nid));
+    $cache[$nid] = $comment->number ? $comment->number : 0;
+  }
+  return $cache[$nid];
 }
 
 function comment_num_replies($id) {
-  $result = db_query("SELECT COUNT(cid) FROM comments WHERE pid = '%d' AND status = 0", $id);
-  return ($result) ? db_result($result, 0) : 0;
+  static $cache;
+
+  if (empty($cache[$nid])) {
+    $result = db_query("SELECT COUNT(cid) FROM comments WHERE pid = '%d' AND status = 0", $id);
+    $cache[$nid] = ($result) ? db_result($result, 0) : 0;
+  }
+
+  return $num_replies[$nid];
 }
 
 /**
@@ -1381,19 +1392,19 @@ function comment_tag_new($nid) {
 
 function comment_is_new($comment) {
   global $user;
-  static $date;
+  static $cache;
 
-  if (!$date[$comment->nid]) {
+  if (!$cache[$comment->nid]) {
     if ($user->uid) {
       $history = db_fetch_object(db_query("SELECT timestamp FROM history WHERE uid = '$user->uid' AND nid = '%d'", $comment->nid));
-      $date[$comment->nid] = $history->timestamp ? $history->timestamp : 0;
+      $cache[$comment->nid] = $history->timestamp ? $history->timestamp : 0;
     }
     else {
-      $date[$comment->nid] = time();
+      $cache[$comment->nid] = time();
     }
   }
 
-  if ($comment->timestamp > $date[$comment->nid]) {
+  if ($comment->timestamp > $cache[$comment->nid]) {
     return 1;
   }
   else {
diff --git a/modules/comment/comment.module b/modules/comment/comment.module
index 4f991b70612..88c2ee7c96b 100644
--- a/modules/comment/comment.module
+++ b/modules/comment/comment.module
@@ -1319,13 +1319,24 @@ function comment_settings($mode, $order, $threshold, $comments_per_page) {
 }
 
 function comment_num_all($nid) {
-  $comment = db_fetch_object(db_query("SELECT COUNT(c.nid) AS number FROM node n LEFT JOIN comments c ON n.nid = c.nid WHERE n.nid = '%d' AND c.status = 0 GROUP BY n.nid", $nid));
-  return $comment->number ? $comment->number : 0;
+  static $cache;
+
+  if (empty($cache[$nid])) {
+    $comment = db_fetch_object(db_query("SELECT COUNT(c.nid) AS number FROM node n LEFT JOIN comments c ON n.nid = c.nid WHERE n.nid = '%d' AND c.status = 0 GROUP BY n.nid", $nid));
+    $cache[$nid] = $comment->number ? $comment->number : 0;
+  }
+  return $cache[$nid];
 }
 
 function comment_num_replies($id) {
-  $result = db_query("SELECT COUNT(cid) FROM comments WHERE pid = '%d' AND status = 0", $id);
-  return ($result) ? db_result($result, 0) : 0;
+  static $cache;
+
+  if (empty($cache[$nid])) {
+    $result = db_query("SELECT COUNT(cid) FROM comments WHERE pid = '%d' AND status = 0", $id);
+    $cache[$nid] = ($result) ? db_result($result, 0) : 0;
+  }
+
+  return $num_replies[$nid];
 }
 
 /**
@@ -1381,19 +1392,19 @@ function comment_tag_new($nid) {
 
 function comment_is_new($comment) {
   global $user;
-  static $date;
+  static $cache;
 
-  if (!$date[$comment->nid]) {
+  if (!$cache[$comment->nid]) {
     if ($user->uid) {
       $history = db_fetch_object(db_query("SELECT timestamp FROM history WHERE uid = '$user->uid' AND nid = '%d'", $comment->nid));
-      $date[$comment->nid] = $history->timestamp ? $history->timestamp : 0;
+      $cache[$comment->nid] = $history->timestamp ? $history->timestamp : 0;
     }
     else {
-      $date[$comment->nid] = time();
+      $cache[$comment->nid] = time();
     }
   }
 
-  if ($comment->timestamp > $date[$comment->nid]) {
+  if ($comment->timestamp > $cache[$comment->nid]) {
     return 1;
   }
   else {