diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8b5be10c..c3583870 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -121,6 +121,11 @@ jobs:
             fi
           done
 
+          if [ ! -d som-vm ]; then
+            echo "All clone attempts failed, falling back to SOM-st"
+            git clone --depth 1 https://github.com/SOM-st/$REPO som-vm
+          fi
+
       - name: Install Apt Packages
         if: ${{ matrix.apt != '' }}
         run: |
diff --git a/Examples/Benchmarks/Knapsack.som b/Examples/Benchmarks/Knapsack.som
new file mode 100644
index 00000000..2c8a8e20
--- /dev/null
+++ b/Examples/Benchmarks/Knapsack.som
@@ -0,0 +1,75 @@
+Knapsack = Benchmark (
+    getWeights = (
+        | weights prng |
+        weights := Vector new.
+        prng := Random new.
+
+        1 to: 100 do: [:w | | repetitions |
+            repetitions := prng next % 50 + 20.
+            repetitions timesRepeat: [ 
+                weights append: w.
+                weights size = 5000 ifTrue: [ 
+                    ^ weights ] ] ].
+        
+        [ weights size < 5000 ] whileTrue: [
+            weights append: 100 ].
+
+        ^ weights
+    )
+
+    getRandomValues = (
+        | values prng i |
+        values := Vector new.
+        prng := Random new.
+
+        5000 timesRepeat: [
+            values append: prng next % 100 ].
+
+        ^ values
+    )
+
+    innerBenchmarkLoop: goal = (
+        | ws vs result expectedResult eI |
+        ws := self getWeights.
+        vs := self getRandomValues.
+
+        result := self knapsack: goal weights: ws values: vs.
+        'result: ' print. result println.
+        
+        expectedResult := #(99 2226 3431 4289 4946 5520 6044 6530 7000 7435 7844 8244 8634 9018
+                            9392 9751 10105 10453 10797 11133 11465 11793 12118 12438 12749
+                            13056 13360 13659 13953 14242 14527 14805 15079 15348 15613 15875
+                            16133 16388 16638 16887 17132).
+        eI := goal / 25 + 1.
+
+        "Remember: this is a bit brittle, and while the `expectedResults` where generated by this code
+                   there seem to be cases where the below doesn't hold.
+                   So, not all problem sizes will validate, but seems good enough for now."
+        eI + 1 <= expectedResult length
+            ifTrue: [
+                ^ result >= (expectedResult at: eI) and: [ result <= (expectedResult at: eI + 1) ] ]
+            ifFalse: [
+                ^ result > expectedResult last ]
+    )
+
+    knapsack: goal weights: w values: v = (
+        | m |
+        ((w size <= 0) || (goal <= 0)) ifTrue: [ ^ 0 ].
+
+        m := Vector new.
+        1 to: 1 + w size do: [ :i |
+            m append: Vector new.
+            1 to: 1 + goal do: [ :j |
+                (m at: i) append: 0 ] ].
+
+        1 to: w size do: [ :i |
+            1 to: goal do: [ :j |
+                (w at: i) > j
+                    ifTrue: [ (m at: i + 1) at: j + 1 put: ((m at: i) at: j + 1) ]
+                    ifFalse: [ (m at: i + 1) at: j + 1 put: (((m at: i) at: j + 1) max: (((m at: i) at: j + 1 - (w at: i)) + (v at: i))) ]
+            ]
+        ].
+
+        ^ (m at: w size) last
+    )
+)
diff --git a/Examples/Benchmarks/VectorBenchmark.som b/Examples/Benchmarks/VectorBenchmark.som
new file mode 100644
index 00000000..dba9de5f
--- /dev/null
+++ b/Examples/Benchmarks/VectorBenchmark.som
@@ -0,0 +1,23 @@
+"A benchmark to exercise #, , #remove: , and #at:put: of the Vector class"
+VectorBenchmark = Benchmark (
+
+    benchmark = (
+        | v |
+
+       "Create a vector and add 1000 items to it"
+       v := Vector new.
+       1 to: 1000 do: [ :i | v, i].
+
+       "Remove 100 items from the middle"
+       450 to: 550 do: [:i | v remove: i].
+
+       "Now change the terms located from 350 to 450"
+       350 to: 450 do: [:i | v at: i put: i+1].
+
+        ^v
+    )
+
+    verifyResult: result = (
+        ^ self assert: 351 equals: (result at: 350)
+    )
+)
diff --git a/TestSuite/VectorTest.som b/TestSuite/VectorTest.som
index 130601bd..9b638026 100644
--- a/TestSuite/VectorTest.som
+++ b/TestSuite/VectorTest.som
@@ -251,7 +251,20 @@ VectorTest = TestCase (
     self assert: 2 equals: (arr at: 1).
     self assert: 5 equals: (arr at: 2).
   )
-  
+
+  "Check that asArray copies storage and a later access does not overwrite the vec's content"
+  testAsArrayEnsureItCopiesStorageArray = (
+    | vec arr |
+    vec := Vector new.
+    vec append: 1.
+    vec append: 2.
+
+    arr := vec asArray.
+    arr at: 1 put: 44.
+
+    self assert: (vec at: 1) equals: 1.
+  )
+
   testAsSet = (
     | v set |
     v := Vector new.
@@ -401,4 +414,16 @@ VectorTest = TestCase (
     ].
     self assert: 6 equals: i.
   )
+
+  "doIndexes iterates from 1 rather then start check core-lib/Vector implementation"
+  testDoIndexesDoubleRemove = (
+    | v |
+    v := Vector new.
+    1 to: 10 do: [:i | v , i].
+
+    v removeFirst.
+    v removeFirst.
+
+    v doIndexes: [:i | self assert: i equals: ((v at: i)-2)]
+  )
 )