diff --git a/Flocking/Ark/Flocking.jl b/Flocking/Ark/Flocking.jl
index 4d9aacc..c1438c8 100644
--- a/Flocking/Ark/Flocking.jl
+++ b/Flocking/Ark/Flocking.jl
@@ -109,7 +109,7 @@ function flocking_step!(world::World, rng)
     entities = buffers.entities
     shuffle!(rng, entities)
     
-    for entity in entities
+    @unchecked for entity in entities
         pos_comp, vel_comp, param = get_components(world, entity, (Position, Velocity, BirdParams))
         pos, vel = pos_comp.p, vel_comp.v
         
diff --git a/Project.toml b/Project.toml
index 2c7921f..f9d64a3 100755
--- a/Project.toml
+++ b/Project.toml
@@ -8,4 +8,5 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
+Ark = "0.4"
 PrettyTables = "2"
diff --git a/README.md b/README.md
index 8d9f501..ad78595 100755
--- a/README.md
+++ b/README.md
@@ -14,14 +14,14 @@ These are the results of the latest comparison:
 
 | Model/Framework  | Agents.jl 6.2.10 | Ark.jl 0.3.2 | MASON 22.0 | Netlogo 6.4.0 | Mesa 3.2.0 |
 |:------------------:|:------------------:|:--------------:|:------------:|:---------------:|:------------:|
-| WolfSheep-small (Time-Ratio)  |       1.0        |     **0.39**     |    5.29    |     9.94      |    9.38    |
-| WolfSheep-large (Time-Ratio)  |       1.0        |     **0.24**     |    7.8     |     4.81      |    3.28    |
+| WolfSheep-small (Time-Ratio)  |       1.0        |     **0.34**     |    5.29    |     9.94      |    9.38    |
+| WolfSheep-large (Time-Ratio)  |       1.0        |     **0.14**     |    7.8     |     4.81      |    3.28    |
 | WolfSheep (Lines of Code) |     **73**          |   149 | 202        |  137 (871)        | 118 |
-|  Flocking-small (Time-Ratio)  |       1.0        |      **0.75**       |    1.42    |     15.37     |   159.29   |
-|  Flocking-large (Time-Ratio)  |       1.0        |     **0.4**     |    0.61    |     19.14     |    59.5    |
+|  Flocking-small (Time-Ratio)  |       1.0        |      **0.73**       |    1.42    |     15.37     |   159.29   |
+|  Flocking-large (Time-Ratio)  |       1.0        |     **0.36**     |    0.61    |     19.14     |    59.5    |
 |   Flocking (Lines of Code)       |       **42**     |   137  | 159     |    82 (689)   |   94       |
-| Schelling-small (Time-Ratio)  |       1.0        |     **0.67**     |    1.19     |     11.39      |    29.73    |
-| Schelling-large (Time-Ratio)  |       1.0        |     **0.68**     |    1.51    |     14.33     |   26.66    |
+| Schelling-small (Time-Ratio)  |       1.0        |     **0.61**     |    1.19     |     11.39      |    29.73    |
+| Schelling-large (Time-Ratio)  |       1.0        |     **0.59**     |    1.51    |     14.33     |   26.66    |
 |    Schelling (Lines of Code)      |       **26**          | 78 |    129   |   54 (739)      |     33    |
 
 ## How it works
@@ -98,3 +98,4 @@ If you are using WSL make sure that you move to a folder inside the subsystem be
 
 
 
+
diff --git a/Schelling/Ark/Schelling.jl b/Schelling/Ark/Schelling.jl
index 9e2efa5..07e20c5 100644
--- a/Schelling/Ark/Schelling.jl
+++ b/Schelling/Ark/Schelling.jl
@@ -58,7 +58,7 @@ function schelling_step!(world::World, rng)
     all_entities = buffers.entities
     shuffle!(rng, all_entities)
     
-    @inbounds for entity in all_entities
+    @inbounds @unchecked for entity in all_entities
         pos, group = get_components(world, entity, (Position, Group))
         
         count_neighbors_same_group = 0
diff --git a/WolfSheep/Ark/WolfSheep.jl b/WolfSheep/Ark/WolfSheep.jl
index f50ac2c..6f58ea6 100644
--- a/WolfSheep/Ark/WolfSheep.jl
+++ b/WolfSheep/Ark/WolfSheep.jl
@@ -86,7 +86,7 @@ function swap_remove!(v::Vector{Entity}, x::Entity)
 end
 
 function sheep_step!(world::World, rng, entities, params, grass, sheep_grid)
-    for entity in entities
+    @unchecked for entity in entities
         pos, energy_comp = get_components(world, entity, (Position, Energy))
         energy = energy_comp.e
         
@@ -118,7 +118,7 @@ function sheep_step!(world::World, rng, entities, params, grass, sheep_grid)
 end
 
 function wolf_step!(world::World, rng, entities, params, sheep_grid)
-    for entity in entities
+    @unchecked for entity in entities
         pos, energy_comp = get_components(world, entity, (Position, Energy))
         energy = energy_comp.e