diff --git a/source/blender/blenkernel/intern/grease_pencil.cc b/source/blender/blenkernel/intern/grease_pencil.cc
index 4139bca25d8..88d65daa988 100644
--- a/source/blender/blenkernel/intern/grease_pencil.cc
+++ b/source/blender/blenkernel/intern/grease_pencil.cc
@@ -640,7 +640,7 @@ static float3x2 get_stroke_to_texture_matrix(const float uv_rotation,
   return texture_matrix;
 }
 
-static float4x3 expand_4x2_mat(float4x2 strokemat)
+static float4x3 expand_4x2_mat(const float4x2 &strokemat)
 {
   float4x3 strokemat4x3 = float4x3(strokemat);
 
diff --git a/source/blender/draw/intern/draw_view.hh b/source/blender/draw/intern/draw_view.hh
index e9ab7379651..e5239abc6bd 100644
--- a/source/blender/draw/intern/draw_view.hh
+++ b/source/blender/draw/intern/draw_view.hh
@@ -194,7 +194,7 @@ class View {
     {
     }
 
-    float4x4 winmat_polygon_offset(float4x4 winmat, float offset)
+    float4x4 winmat_polygon_offset(const float4x4 &winmat, float offset)
     {
       float view_dist = dist;
       /* Special exception for orthographic camera:
@@ -203,12 +203,13 @@ class View {
         view_dist = 1.0f / max_ff(fabsf(winmat[0][0]), fabsf(winmat[1][1]));
       }
 
-      winmat[3][2] -= GPU_polygon_offset_calc(winmat.ptr(), view_dist, offset);
-      return winmat;
+      float4x4 result = winmat;
+      result[3][2] -= GPU_polygon_offset_calc(winmat.ptr(), view_dist, offset);
+      return result;
     }
 
     /* Return unit offset to apply to `gl_Position.z`. To be scaled depending on purpose. */
-    float polygon_offset_factor(float4x4 winmat)
+    float polygon_offset_factor(const float4x4 &winmat)
     {
       float view_dist = dist;
       /* Special exception for orthographic camera:
diff --git a/source/blender/editors/grease_pencil/intern/grease_pencil_utils.cc b/source/blender/editors/grease_pencil/intern/grease_pencil_utils.cc
index 5fc95219d9f..5f85f698eba 100644
--- a/source/blender/editors/grease_pencil/intern/grease_pencil_utils.cc
+++ b/source/blender/editors/grease_pencil/intern/grease_pencil_utils.cc
@@ -1548,8 +1548,8 @@ float radius_from_input_sample(const RegionView3D *rv3d,
                                const ARegion *region,
                                const Brush *brush,
                                const float pressure,
-                               const float3 location,
-                               const float4x4 to_world,
+                               const float3 &location,
+                               const float4x4 &to_world,
                                const BrushGpencilSettings *settings)
 {
   float radius = brush_radius_at_location(rv3d, region, brush, location, to_world);
diff --git a/source/blender/editors/include/ED_grease_pencil.hh b/source/blender/editors/include/ED_grease_pencil.hh
index ebe636f7abc..3061eac3122 100644
--- a/source/blender/editors/include/ED_grease_pencil.hh
+++ b/source/blender/editors/include/ED_grease_pencil.hh
@@ -342,8 +342,8 @@ float radius_from_input_sample(const RegionView3D *rv3d,
                                const ARegion *region,
                                const Brush *brush,
                                float pressure,
-                               float3 location,
-                               float4x4 to_world,
+                               const float3 &location,
+                               const float4x4 &to_world,
                                const BrushGpencilSettings *settings);
 wmOperatorStatus grease_pencil_draw_operator_invoke(bContext *C,
                                                     wmOperator *op,
diff --git a/source/blender/geometry/intern/mesh_boolean_manifold.cc b/source/blender/geometry/intern/mesh_boolean_manifold.cc
index 1ada5d32473..f0a485e5045 100644
--- a/source/blender/geometry/intern/mesh_boolean_manifold.cc
+++ b/source/blender/geometry/intern/mesh_boolean_manifold.cc
@@ -1662,7 +1662,7 @@ static void get_intersecting_edges(Vector<int> *r_intersecting_edges,
  * from the origin to the plane in the normal direction.
  */
 static bool is_plane(const Mesh *mesh,
-                     float4x4 transform,
+                     const float4x4 &transform,
                      float3 *r_normal,
                      float *r_origin_offset)
 {