diff --git a/server/TracyView.cpp b/server/TracyView.cpp
index ce0de085..eb83b373 100644
--- a/server/TracyView.cpp
+++ b/server/TracyView.cpp
@@ -8730,4 +8730,18 @@ int64_t View::GetZoneChildTime( const ZoneEvent& zone )
     return time;
 }
 
+int64_t View::GetZoneChildTimeFast( const ZoneEvent& zone )
+{
+    int64_t time = 0;
+    if( zone.child >= 0 )
+    {
+        for( auto& v : m_worker.GetZoneChildren( zone.child ) )
+        {
+            assert( v->end >= 0 );
+            time += v->end - v->start;
+        }
+    }
+    return time;
+}
+
 }
diff --git a/server/TracyView.hpp b/server/TracyView.hpp
index abee0eb7..89b8be3b 100644
--- a/server/TracyView.hpp
+++ b/server/TracyView.hpp
@@ -162,6 +162,7 @@ private:
     void SmallCallstackButton( const char* name, uint32_t callstack, int& idx );
     void SetViewToLastFrames();
     int64_t GetZoneChildTime( const ZoneEvent& zone );
+    int64_t GetZoneChildTimeFast( const ZoneEvent& zone );
 
     flat_hash_map<const void*, bool, nohash<const void*>> m_visible;
     flat_hash_map<uint64_t, bool, nohash<uint64_t>> m_visibleMsgThread;