diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 64615906e..1276e4b38 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -74,6 +74,10 @@ TARGET_LINK_LIBRARIES(dfspatterdump dfhack)
 ADD_EXECUTABLE(dfcatsplosion catsplosion.cpp)
 TARGET_LINK_LIBRARIES(dfcatsplosion dfhack)
 
+# flows - check flows impact on fps
+ADD_EXECUTABLE(dfflows flows.cpp)
+TARGET_LINK_LIBRARIES(dfflows dfhack)
+
 IF(UNIX)
     SET(CURSES_NEED_WIDE "YES")
     SET(CURSES_NEED_NCURSES "NO")
diff --git a/examples/flows.cpp b/examples/flows.cpp
new file mode 100644
index 000000000..352a16da2
--- /dev/null
+++ b/examples/flows.cpp
@@ -0,0 +1,83 @@
+// This is a reveal program. It reveals the map.
+
+#include <iostream>
+#include <integers.h>
+#include <vector>
+using namespace std;
+
+#include <DFTypes.h>
+#include <DFHackAPI.h>
+#include <modules/Maps.h>
+
+int main (void)
+{
+    uint32_t x_max,y_max,z_max;
+    DFHack::designations40d designations;
+    
+    DFHack::API DF("Memory.xml");
+    try
+    {
+        DF.Attach();
+    }
+    catch (exception& e)
+    {
+        cerr << e.what() << endl;
+        #ifndef LINUX_BUILD
+            cin.ignore();
+        #endif
+        return 1;
+    }
+    
+    DFHack::Maps *Maps =DF.getMaps();
+    // init the map
+    if(!Maps->Start())
+    {
+        cerr << "Can't init map." << endl;
+        #ifndef LINUX_BUILD
+            cin.ignore();
+        #endif
+        return 1;
+    }
+    DFHack::t_blockflags bflags;
+    Maps->getSize(x_max,y_max,z_max);
+    // walk the map, count flowing tiles, magma, water
+    uint32_t flow1=0, flow2=0, flowboth=0, water=0, magma=0;
+    cout << "Counting flows and liquids .";
+    for(uint32_t x = 0; x< x_max;x++)
+    {
+        for(uint32_t y = 0; y< y_max;y++)
+        {
+            for(uint32_t z = 0; z< z_max;z++)
+            {
+                if(Maps->isValidBlock(x,y,z))
+                {
+                    Maps->ReadBlockFlags(x, y, z, bflags);
+                    Maps->ReadDesignations(x, y, z, &designations);
+                    if (bflags.bits.liquid_1)
+                        flow1++;
+                    if (bflags.bits.liquid_2)
+                        flow2++;
+                    if (bflags.bits.liquid_1 && bflags.bits.liquid_2)
+                        flowboth++;
+                    for (uint32_t i = 0; i < 16;i++) for (uint32_t j = 0; j < 16;j++)
+                    {
+                        if (designations[i][j].bits.liquid_type == DFHack::liquid_magma)
+                            magma++;
+                        if (designations[i][j].bits.liquid_type == DFHack::liquid_water)
+                            water++;
+                    }
+                    // Maps->WriteDesignations(x, y, z, &designations);
+                    // Maps->WriteBlockFlags(x, y, z, bflags);
+                    cout << ".";
+                }
+            }
+        }
+    }
+    cout << endl << "Done." << endl;
+    cout << "Blocks with liquid_1=true: " << flow1 << endl;
+    cout << "Blocks with liquid_2=true: " << flow2 << endl;
+    cout << "Blocks with both: " << flowboth << endl;
+    cout << "Water tiles: " << water << endl;
+    cout << "Magma tiles: " << magma << endl;
+    return 0;
+}