diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c1081ec..5d6fb46 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -37,10 +37,6 @@ jobs:
       # Run build
       - name: Build
         run: npm run build
-        
-      # Run Stryker-Mutator check
-      - name: Stryker-Mutator
-        run: npm run test:mutate
 
       # Adds Chromatic as a step in the workflow
       - name: Publish to Chromatic
@@ -50,3 +46,17 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           # Chromatic projectToken, refer to the manage page to obtain it.
           projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
+          
+  mutation_testing:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Install deps
+      - name: Install npm deps
+        run: npm i
+
+      # Run Stryker-Mutator check
+      - name: Stryker-Mutator
+        run: npm run test:mutate
diff --git a/README.md b/README.md
index 66f07e8..a8314e9 100644
--- a/README.md
+++ b/README.md
@@ -258,3 +258,9 @@
 ### Refactoring useGame 2
 
 [Pull request](https://github.com/nickovchinnikov/minesweeper/pull/46/files)
+
+### RDT profiler and React.memo + useCallback intro
+
+### React.memo + useCallback optimization
+
+[Pull request](https://github.com/nickovchinnikov/minesweeper/pull/47/files)