diff --git a/creation_repo.sh b/creation_repo.sh
index fd0554f..cb7e4ac 100755
--- a/creation_repo.sh
+++ b/creation_repo.sh
@@ -24,9 +24,11 @@ if [[ "${BASH_SOURCE[0]}" = "${0}" ]]; then
          exit;;
    esac
 done
-    return 0
 fi
 
+create_random_file(){
+    run dd if=/dev/urandom of=$1 bs=$2 count=1 &> /dev/null
+}
 
 REPO_NAME=performance_testing
 REPO_PATH=./remote
@@ -40,23 +42,23 @@ if [ ! -d $REPO_NAME ]; then
     cd $REPO_NAME
     git init
     git branch -m main
-    dd if=/dev/urandom of=sample0 bs=1M count=1
+    create_random_file 'sample0' '1M'
     git add .
     git commit -m"first 1M sample created"
     git tag start
-    dd if=/dev/urandom of=sample1 bs=1M count=1
+    create_random_file 'sample1' '1M'
     git add sample1
     git commit -m"second 1M sample created"
     git branch secondary
     git checkout secondary
-    dd if=/dev/urandom of=sample2 bs=500K count=1
+    create_random_file 'sample2' '500K'
     git add sample2  
     git commit -m"first 500K sample created in branch secondary"
     git checkout main
-    dd if=/dev/urandom of=sample3 bs=1M count=1
+    create_random_file 'sample3' '1M'
     git add sample3
     git commit -m"third 1M sample created"
-    dd if=/dev/urandom of=sample4 bs=5M count=1
+    create_random_file 'sample4' '5M'
     git add sample4
     git commit -m"first 5M sample created"
     rm sample4
diff --git a/notes.odt b/notes.odt
index cf63801..92b0b6e 100644
Binary files a/notes.odt and b/notes.odt differ
diff --git a/performance_tests.sh b/performance_tests.sh
index cd9ad79..49215c4 100755
--- a/performance_tests.sh
+++ b/performance_tests.sh
@@ -117,6 +117,7 @@ test4(){
 test5(){
     section TEST5
     run echo 'TEST 5 : case of classic fetching and merging, after addition of a 1M file'
+    #initialization
     run git clone $1 &> /dev/null
     cd $REPO_NAME
     run git fetch --progress origin &> /dev/null
@@ -129,6 +130,7 @@ test5(){
     run git add sample5 
     run git commit --quiet -m"fourth 1M sample created"
     cd ../../$REPO_NAME
+    #fetching
     run git fetch --progress origin &> /dev/null
     run git merge --progress &> fetching_text
     get_storage_used .
@@ -144,8 +146,9 @@ test5(){
 }
 
 test6(){
-        section TEST6
+    section TEST6
     run echo 'TEST 6 : case of classic fetching and merging, after removal of a 1M file'
+    #initialization
     run git clone $1 &> /dev/null
     cd $REPO_NAME
     run git fetch --progress origin &> /dev/null
@@ -158,6 +161,7 @@ test6(){
     run git add sample0 
     run git commit --quiet -m"1M sample0 deleted"
     cd ../../$REPO_NAME
+    #fetching
     run git fetch --progress origin &> /dev/null
     run git merge --progress &> fetching_text
     get_storage_used .
@@ -175,6 +179,7 @@ test6(){
 test7(){
     section TEST7
     run echo 'TEST 7 : case of classic fetching and merging, after addition then removal of a 1M file'
+    #initialization
     run git clone $1 &> /dev/null
     cd $REPO_NAME
     run git fetch --progress origin &> /dev/null
@@ -190,6 +195,7 @@ test7(){
     run git add sample5
     run git commit --quiet -m"1M "sample5" deleted"
     cd ../../$REPO_NAME
+    #fetching
     run git fetch --progress origin &> /dev/null
     run git merge --progress &> /dev/null
     get_storage_used .
@@ -205,11 +211,12 @@ test7(){
 
 test8(){
     section TEST8
-    run echo 'TEST 8 : case of classic fetching and merging, after addition of a 1M file'
-    run git clone $1 &> /dev/null
+    run echo 'TEST 8 : case of fetching --depth=1 and merging, after addition of a 1M file'
+    #initialization
+    run git clone $1 #&> /dev/null
     cd $REPO_NAME
-    run git fetch --progress --depth=1 origin &> /dev/null
-    run git merge --progress origin &> /dev/null
+    run git fetch --progress origin &> fetching1 #&> /dev/null  is this useless?
+    run git merge --progress origin &> merging1 #&> /dev/null
     get_storage_used .
     mem_before=$mem
     #modification of the remote repo  
@@ -218,8 +225,8 @@ test8(){
     run git add sample5 
     run git commit --quiet -m"fourth 1M sample created"
     cd ../../$REPO_NAME
-    run git fetch --progress origin &> /dev/null
-    run git merge --progress &> fetching_text
+    run git fetch --progress --depth=1 origin &> fetching2 # /dev/null
+    run git merge --progress --allow-unrelated-histories &> merging2
     get_storage_used .
     mem_after=$mem
     mem=$(($mem_after-$mem_before))
@@ -227,12 +234,75 @@ test8(){
     echo "memory usage: +$mem"
     echo "bandwidth usage: $bw"
     cd ../$REMOTE
+    git reset --hard -q a99be63309fc4f4600210000583546d966d12d4f #does not work cause commits change numbers 
+    cd ../..
+    #rm -rf performance_testing
+}
+
+test9(){
+        section TEST9
+    run echo 'TEST 9 : case of --depth=1 fetching and merging, after removal of a 1M file'
+    #initialization 
+    run git clone $1 &> /dev/null
+    cd $REPO_NAME
+    run git fetch --progress origin &> /dev/null
+    run git merge --progress origin &> /dev/null
+    get_storage_used .
+    mem_before=$mem
+    #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
+    #fetching
+    run git fetch --progress --depth=1 origin &> /dev/null
+    run git merge --progress &> fetching_text
+    get_storage_used .
+    mem_after=$mem
+    mem=$(($mem_after-$mem_before))
+    get_bandwidth fetching_text
+    echo "memory usage: $mem"
+    echo "bandwidth usage: $bw"
+    cd ../$REMOTE
     git reset --hard -q a99be63309fc4f4600210000583546d966d12d4f
     cd ../..
     rm -rf performance_testing
 }
 
-
+test10(){
+    section TEST10
+    run echo 'TEST 10 : case of --depth=1 fetching and merging, after addition then removal of a 1M file'
+    run git clone $1 &> /dev/null
+    cd $REPO_NAME
+    run git fetch --progress origin &> /dev/null
+    run git merge --progress origin &> /dev/null
+    get_storage_used .
+    mem_before=$mem 
+    echo "mem before is $mem_before"
+    #modification of the remote repo  
+    cd ../$REMOTE
+    create_random_file 'sample5' '1M' #adding a 1M file
+    run git add sample5 
+    run git commit --quiet -m"fourth 1M sample created"
+    run rm sample5
+    run git add sample5
+    run git commit --quiet -m"1M "sample5" deleted"
+    cd ../../$REPO_NAME
+    #fetching
+    run git fetch --progress --depth=1 origin &> /fetching_text #dev/null
+    run git merge --progress &> merging_text #/dev/null
+    get_storage_used .
+    mem_after=$mem
+    echo "mem after is $mem_before"
+    mem=$(($mem_after-$mem_before))
+    echo "memory usage: $mem"
+    echo "bandwidth usage unknown"
+    cd ../$REMOTE
+    git reset --hard -q a99be63309fc4f4600210000583546d966d12d4f
+    cd ../..
+    rm -rf performance_testing
+}
 
 while getopts ":hn:a" option; do
    case $option in
@@ -259,6 +329,8 @@ if [ "$ALL_TESTS" = true ]; then
     test6 $REMOTE
     test7 $REMOTE
     test8 $REMOTE
+    test9 $REMOTE
+    test10 $REMOTE
 
 elif [ -n "$TEST_NUM" ]; then
     case $TEST_NUM in
@@ -280,6 +352,10 @@ elif [ -n "$TEST_NUM" ]; then
             test7 $REMOTE;;
         8) 
             test8 $REMOTE;;
+        9)
+            test9 $REMOTE;;
+        10)
+            test10 $REMOTE;;
         *)
             echo "Error: Invalid test number"
             die;;