diff --git a/src/solvers/dgsem_tree/container_viscous_2d.jl b/src/solvers/dgsem_tree/container_viscous_2d.jl
index 57cb3728a11..bd7ff413af5 100644
--- a/src/solvers/dgsem_tree/container_viscous_2d.jl
+++ b/src/solvers/dgsem_tree/container_viscous_2d.jl
@@ -1,7 +1,10 @@
 mutable struct ViscousContainer2D{uEltype <: Real}
     u_transformed::Array{uEltype, 4}
     # Using an outer fixed-size datastructure leads to nasty implementations,
-    # avoid this here.
+    # see https://github.com/trixi-framework/Trixi.jl/pull/1629#discussion_r1355293953.
+    # Also: This does not result in speed up compared to using tuples for the internal 
+    # datastructures, see 
+    # https://github.com/trixi-framework/Trixi.jl/pull/1629#discussion_r1363352188.
     gradients::Vector{Array{uEltype, 4}}
     flux_viscous::Vector{Array{uEltype, 4}}
 
diff --git a/src/solvers/dgsem_tree/container_viscous_3d.jl b/src/solvers/dgsem_tree/container_viscous_3d.jl
index 083bb5284a5..64d283fe189 100644
--- a/src/solvers/dgsem_tree/container_viscous_3d.jl
+++ b/src/solvers/dgsem_tree/container_viscous_3d.jl
@@ -1,7 +1,10 @@
 mutable struct ViscousContainer3D{uEltype <: Real}
     u_transformed::Array{uEltype, 5}
     # Using an outer fixed-size datastructure leads to nasty implementations,
-    # avoid this here.
+    # see https://github.com/trixi-framework/Trixi.jl/pull/1629#discussion_r1355293953.
+    # Also: This does not result in speed up compared to using tuples for the internal 
+    # datastructures, see 
+    # https://github.com/trixi-framework/Trixi.jl/pull/1629#discussion_r1363352188.
     gradients::Vector{Array{uEltype, 5}}
     flux_viscous::Vector{Array{uEltype, 5}}