diff --git a/benchmarks/CMakeLists.txt b/benchmarks/CMakeLists.txt
--- a/benchmarks/CMakeLists.txt
+++ b/benchmarks/CMakeLists.txt
@@ -13,7 +13,7 @@
 set(LINK_VC_LIB)
 if(HAVE_VC)
   include_directories(${Vc_INCLUDE_DIR})
-#  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Vc_DEFINITIONS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Vc_DEFINITIONS}")
   set(LINK_VC_LIB ${Vc_LIBRARIES})
 endif()
 
@@ -38,7 +38,7 @@
 set(kis_low_memory_benchmark_SRCS kis_low_memory_benchmark.cpp)
 set(kis_filter_selections_benchmark_SRCS kis_filter_selections_benchmark.cpp)
 if (UNIX)
-	#set(kis_composition_benchmark_SRCS kis_composition_benchmark.cpp)
+        set(kis_composition_benchmark_SRCS kis_composition_benchmark.cpp)
 endif()
 set(kis_thumbnail_benchmark_SRCS kis_thumbnail_benchmark.cpp)
 
@@ -59,7 +59,7 @@
 krita_add_benchmark(KisLowMemoryBenchmark TESTNAME krita-benchmarks-KisLowMemory ${kis_low_memory_benchmark_SRCS})
 krita_add_benchmark(KisFilterSelectionsBenchmark TESTNAME krita-image-KisFilterSelectionsBenchmark ${kis_filter_selections_benchmark_SRCS})
 if(UNIX)
-	#krita_add_benchmark(KisCompositionBenchmark TESTNAME krita-benchmarks-KisComposition ${kis_composition_benchmark_SRCS})
+        krita_add_benchmark(KisCompositionBenchmark TESTNAME krita-benchmarks-KisComposition ${kis_composition_benchmark_SRCS})
 endif()
 krita_add_benchmark(KisThumbnailBenchmark TESTNAME krita-benchmarks-KisThumbnail ${kis_thumbnail_benchmark_SRCS})
 
@@ -80,10 +80,10 @@
 target_link_libraries(KisFilterSelectionsBenchmark   kritaimage  Qt5::Test)
 
 if(UNIX)
-	#target_link_libraries(KisCompositionBenchmark  kritaimage  Qt5::Test ${LINK_VC_LIB})
-	#if(HAVE_VC)
-	#	set_property(TARGET KisCompositionBenchmark APPEND PROPERTY COMPILE_OPTIONS "${Vc_ARCHITECTURE_FLAGS}")
-	#endif()
+    target_link_libraries(KisCompositionBenchmark  kritaimage  Qt5::Test ${LINK_VC_LIB})
+    if(HAVE_VC)
+        set_property(TARGET KisCompositionBenchmark APPEND PROPERTY COMPILE_OPTIONS "${Vc_ARCHITECTURE_FLAGS}")
+    endif()
 endif()
 target_link_libraries(KisMaskGeneratorBenchmark  kritaimage  Qt5::Test)
 target_link_libraries(KisThumbnailBenchmark  kritaimage  Qt5::Test)
diff --git a/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h b/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h
--- a/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h
+++ b/libs/pigment/compositeops/KoOptimizedCompositeOpOver32.h
@@ -26,6 +26,38 @@
 #include "KoStreamedMath.h"
 
 
+template<Vc::Implementation _impl>
+struct OptiDiv {
+    static ALWAYS_INLINE float divScalar(const float& divident, const float& divisor) {
+#ifdef __SSE__
+        float result;
+
+        __m128 x = _mm_set_ss(divisor);
+        __m128 y = _mm_set_ss(divident);
+        x = _mm_rcp_ss(x);
+        x = _mm_mul_ss(x, y);
+
+
+        _mm_store_ss(&result, x);
+        return result;
+#else
+        return divident / divisor;
+#endif
+
+    }
+
+    static ALWAYS_INLINE Vc::float_v divVector(Vc::float_v::AsArg divident, Vc::float_v::AsArg  divisor) {
+#ifdef __SSE__
+        return divident * Vc::reciprocal(divisor);
+#else
+        return divident / divisor;
+#endif
+
+    }
+
+};
+
+
 template<typename channels_type, typename pixel_type, bool alphaLocked, bool allChannelsFlag>
 struct OverCompositor32 {
     struct OptionalParams {
@@ -97,7 +129,11 @@
              * be converted to zeroes, which is exactly what we need
              */
             new_alpha = dst_alpha + (uint8Max - dst_alpha) * src_alpha * uint8MaxRec1;
-            src_blend = src_alpha / new_alpha;
+
+            // Optimized version of:
+            //     src_blend = src_alpha / new_alpha;
+            src_blend = OptiDiv<_impl>::divVector(src_alpha, new_alpha);
+
         }
 
         if (!(src_blend == oneValue).isFull()) {
@@ -156,7 +192,10 @@
                 }
             } else {
                 dstAlpha += (uint8Max - dstAlpha) * srcAlpha * uint8Rec1;
-                srcBlendNorm = srcAlpha / dstAlpha;
+                // Optimized version of:
+                //     srcBlendNorm = srcAlpha / dstAlpha);
+                srcBlendNorm = OptiDiv<_impl>::divScalar(srcAlpha, dstAlpha);
+
             }
 
             if(allChannelsFlag) {