diff --git a/notes.odt b/notes.odt
index 75318e8..cf63801 100644
Binary files a/notes.odt and b/notes.odt differ
diff --git a/performance_tests.sh b/performance_tests.sh
index a15b203..fa2b256 100755
--- a/performance_tests.sh
+++ b/performance_tests.sh
@@ -91,7 +91,7 @@ test4(){
 #WITHOUT CHANGING ANYTHING
 test5(){
     section TEST5
-    run echo 'TEST 5 : case of classic fetching and merging'
+    run echo 'TEST 5 : case of classic fetching and merging, after addition of a 1M file'
     run git clone $1 &> /dev/null
     cd $REPO_NAME
     run git fetch --progress origin &> /dev/null
@@ -107,7 +107,7 @@ test5(){
     run git merge --progress &> merging_text
     mem5after=$(du . | tail -n1 | tr -cd [:digit:]) 
     mem5=$(($mem5after-$mem5before))
-    bw5=$(grep -o "[[:digit:].]* bytes" merging_text| grep -o "[[:digit:].]* [[:alpha:]]*")
+    bw5=$(grep -e  "\->" merging_text| grep -o "[[:digit:].]* -> [[:digit:].]* [[:alpha:]]*")
     echo "memory usage in a classic fetching and merging : $mem5"
     echo "bandwidth usage : $bw5"
     cd ../$REMOTE
@@ -116,7 +116,36 @@ test5(){
     rm -rf performance_testing
 }
 
-#test 6 : shallow exclude
+test6(){
+        section TEST5
+    run echo 'TEST 6 : case of classic fetching and merging, after removal of a 1M file'
+    run git clone $1 &> /dev/null
+    cd $REPO_NAME
+    run git fetch --progress origin &> /dev/null
+    run git merge --progress origin &> /dev/null
+    mem6before=$(du . | tail -n1 | tr -cd [:digit:]) 
+    #modification of the remote repo  
+    cd ../$REMOTE
+    run rm sample0
+    run git add sample0 
+    run git commit --quiet -m"1M sample0 deleted"
+    cd ../../$REPO_NAME
+    run git fetch --progress origin &> fetching_text
+    run git merge --progress &> merging_text
+    mem6after=$(du . | tail -n1 | tr -cd [:digit:]) 
+    mem6=$(($mem6after-$mem6before))
+    bw6=$(grep -e  "\->" merging_text| grep -o "[[:digit:].]* -> [[:digit:].]* [[:alpha:]]*")
+    echo "memory usage in a classic fetching and merging : $mem6"
+    echo "bandwidth usage : $bw6"
+    cd ../$REMOTE
+    git reset --hard -q a99be63309fc4f4600210000583546d966d12d4f
+    cd ../..
+    rm -rf performance_testing
+}
+
+#modify to have a history of changes 
+#test 7 : --depth=1
+#normalement supprime aussi l'historique
 
 while getopts ":hn:a" option; do
    case $option in
@@ -140,6 +169,7 @@ if [ "$ALL_TESTS" = true ]; then
     test3 $REMOTE
     test4 $REMOTE
     test5 $REMOTE
+    test6 $REMOTE
 
 elif [ -n "$TEST_NUM" ]; then
     case $TEST_NUM in
@@ -155,6 +185,8 @@ elif [ -n "$TEST_NUM" ]; then
             test4 $REMOTE;;
         5) 
             test5 $REMOTE;;
+        6)
+            test6 $REMOTE;;
         *)
             echo "Error: Invalid test number"
             die;;