diff --git a/package/src/Interpreter.jl b/package/src/Interpreter.jl
index a0138f8..d3424f9 100644
--- a/package/src/Interpreter.jl
+++ b/package/src/Interpreter.jl
@@ -24,17 +24,17 @@ function interpret(cudaExprs, numExprs::Integer, exprsInnerLength::Integer,
 	cudaResults = CuArray{Float32}(undef, variableColumns, numExprs)
 
 	# Start kernel for each expression to ensure that no warp is working on different expressions
-	@inbounds Threads.@threads for i in 1:numExprs # multithreaded to speedup dispatching (seems to have improved performance)
-		numThreads = min(variableColumns, 121)
-		numBlocks = cld(variableColumns, numThreads)
+	numThreads = min(variableColumns, 121)
+	numBlocks = cld(variableColumns, numThreads)
 
+	@inbounds Threads.@threads for i in 1:numExprs # multithreaded to speedup dispatching (seems to have improved performance)
 		@cuda threads=numThreads blocks=numBlocks fastmath=true interpret_expression(cudaExprs, cudaVars, cudaParams, cudaResults, cudaStepsize, i)
 	end
 
 	return cudaResults
 end
 
-const MAX_STACK_SIZE = 25 # The depth of the stack to store the values and intermediate results
+const MAX_STACK_SIZE = 10 # The depth of the stack to store the values and intermediate results
 function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, variables::CuDeviceArray{Float32}, parameters::CuDeviceArray{Float32}, results::CuDeviceArray{Float32}, stepsize::CuDeviceArray{Int}, exprIndex::Int)
 	varSetIndex = (blockIdx().x - 1) * blockDim().x + threadIdx().x # ctaid.x * ntid.x + tid.x (1-based)
 	@inbounds variableCols = length(variables) / stepsize[3] # number of variable sets
@@ -92,7 +92,6 @@ function interpret_expression(expressions::CuDeviceArray{ExpressionElement}, var
 			elseif opcode == SQRT
 				operationStack[operationStackTop] = sqrt(operationStack[operationStackTop])
 			elseif opcode == INV
-				# operationStack[operationStackTop] = 1f0 / operationStack[operationStackTop]
 				operationStack[operationStackTop] = inv(operationStack[operationStackTop])
 			end
 		else
diff --git a/package/test/PerformanceTuning.jl b/package/test/PerformanceTuning.jl
index fe64cc1..3533572 100644
--- a/package/test/PerformanceTuning.jl
+++ b/package/test/PerformanceTuning.jl
@@ -29,10 +29,10 @@ expr_reps = 1
 
 
 @testset "Interpreter Tuning" begin
-    # CUDA.@profile interpret_gpu(exprs, X, parameters; repetitions=expr_reps)
+    CUDA.@profile interpret_gpu(exprs, X, parameters; repetitions=expr_reps)
 end
 
 
 @testset "Transpiler Tuning" begin
-    CUDA.@profile evaluate_gpu(exprs, X, parameters; repetitions=expr_reps)
+    # CUDA.@profile evaluate_gpu(exprs, X, parameters; repetitions=expr_reps)
 end
\ No newline at end of file