diff --git a/.hgtags b/.hgtags
index a8f100b4462bbdb51c00592ce88a92662c89db91..8d587d5aff9e0c0cfc8e8d3d665dcb48814cad48 100755
--- a/.hgtags
+++ b/.hgtags
@@ -337,3 +337,4 @@ fba99f381b8d4ad1b7b42fa4993b29998d95be18 DRTVWR-179
 52c164c8023a5e65f3dc1b0bbb7fa1dd0c631b6b DRTVWR-231
 464cf7a63a9a2f95bc4972dc022ca765e93de7d3 DRTVWR-233
 637fe8bbee5e24940448198c221d5ee0fa3247b4 3.4.1-beta9
+4e0d84e92132e9e95a1d52a1e49bad69c278ea05 3.4.1-beta10
diff --git a/indra/cmake/GooglePerfTools.cmake b/indra/cmake/GooglePerfTools.cmake
index 73b3642ae646c3e5ff493157e92d32b9fcb7c9fb..09501e0406e637ceea1e1c92d10291504e9fe2da 100644
--- a/indra/cmake/GooglePerfTools.cmake
+++ b/indra/cmake/GooglePerfTools.cmake
@@ -3,7 +3,7 @@ include(Prebuilt)
 
 # If you want to enable or disable TCMALLOC in viewer builds, this is the place.
 # set ON or OFF as desired.
-set (USE_TCMALLOC OFF)
+set (USE_TCMALLOC ON)
 
 if (STANDALONE)
   include(FindGooglePerfTools)