diff --git a/.gitea/workflows/julia-package-ci.yml b/.gitea/workflows/julia-package-ci.yml
index 446f366..7bf1568 100644
--- a/.gitea/workflows/julia-package-ci.yml
+++ b/.gitea/workflows/julia-package-ci.yml
@@ -28,3 +28,6 @@ jobs:
 
       - name: Run tests
         run: julia --project -e 'import Pkg; Pkg.test()'
+
+      - name: Run examples
+        run: julia --project -e 'import Pkg; include("examples/import_bench.jl")'
diff --git a/examples/ABAB_graph.jl b/examples/ABAB_graph.jl
index 05037c9..50cfd68 100644
--- a/examples/ABAB_graph.jl
+++ b/examples/ABAB_graph.jl
@@ -1,4 +1,4 @@
-using metagraph_optimization
+using MetagraphOptimization
 
 function main()
     graph = DAG()
diff --git a/examples/import_bench.jl b/examples/import_bench.jl
index ef138c5..61f3671 100644
--- a/examples/import_bench.jl
+++ b/examples/import_bench.jl
@@ -8,6 +8,10 @@ function bench_txt(filepath::String, bench::Bool = true)
     name, _ = splitext(name)
 
     filepath = joinpath(@__DIR__, filepath)
+    if !isfile(filepath)
+        println("File ", filepath, " does not exist, skipping bench")
+        return
+    end
 
     println(name, ":")
     g = import_txt(filepath)
diff --git a/src/MetagraphOptimization.jl b/src/MetagraphOptimization.jl
index 2c87bf3..594675b 100644
--- a/src/MetagraphOptimization.jl
+++ b/src/MetagraphOptimization.jl
@@ -1,21 +1,4 @@
 module MetagraphOptimization
-import Base.show
-import Base.==
-import Base.in
-import Base.copy
-
-include("tasks.jl")
-include("nodes.jl")
-include("graph.jl")
-include("task_functions.jl")
-include("node_functions.jl")
-include("graph_functions.jl")
-include("graph_operations.jl")
-include("import.jl")
-include("utility.jl")
-
-include("abc_model/tasks.jl")
-include("abc_model/task_functions.jl")
 
 export Node, Edge, ComputeTaskNode, DataTaskNode, DAG
 export AbstractTask, AbstractComputeTask, AbstractDataTask, DataTask, ComputeTaskP, ComputeTaskS1, ComputeTaskS2, ComputeTaskV, ComputeTaskU, ComputeTaskSum, FusedComputeTask
@@ -27,4 +10,25 @@ export ==, in, show
 
 export bytes_to_human_readable
 
+
+import Base.show
+import Base.==
+import Base.in
+import Base.copy
+
+
+include("tasks.jl")
+include("nodes.jl")
+include("graph.jl")
+
+include("task_functions.jl")
+include("node_functions.jl")
+include("graph_functions.jl")
+include("graph_operations.jl")
+include("import.jl")
+include("utility.jl")
+
+include("abc_model/tasks.jl")
+include("abc_model/task_functions.jl")
+
 end # module MetagraphOptimization
diff --git a/src/graph.jl b/src/graph.jl
index 920b382..d56fc4b 100644
--- a/src/graph.jl
+++ b/src/graph.jl
@@ -51,18 +51,18 @@ end
 
 
 mutable struct PossibleOperations
-   nodeFusions::Vector{NodeFusion}
-   nodeReductions::Vector{NodeReduction}
-   nodeSplits::Vector{NodeSplit}
+   nodeFusions::Set{NodeFusion}
+   nodeReductions::Set{NodeReduction}
+   nodeSplits::Set{NodeSplit}
    dirty::Bool
 end
 
 function PossibleOperations()
    return PossibleOperations(
-      Vector{NodeFusion}(),
-      Vector{NodeReduction}(),
-      Vector{NodeSplit}(),
-      false
+      Set{NodeFusion}(),
+      Set{NodeReduction}(),
+      Set{NodeSplit}(),
+      true
    )
 end