benchmarking: removed caches to get initial performance measurement. still some problems

package/src/Interpreter.jl

@@ -6,18 +6,17 @@ using ..Utils
 
 export interpret
 
-const cacheFrontend = Dict{Expr, PostfixType}()
-
 "Interprets the given expressions with the values provided.
 # Arguments
  - expressions::Vector{ExpressionProcessing.PostfixType} : The expressions to execute in postfix form
  - variables::Matrix{Float32} : The variables to use. Each column is mapped to the variables x1..xn
  - parameters::Vector{Vector{Float32}} : The parameters to use. Each Vector contains the values for the parameters p1..pn. The number of parameters can be different for every expression
+ - kwparam ```frontendCache```: The cache that stores the (partial) results of the frontend
 "
 function interpret(expressions::Vector{Expr}, variables::Matrix{Float32}, parameters::Vector{Vector{Float32}})::Matrix{Float32}
 	exprs = Vector{ExpressionProcessing.PostfixType}(undef, length(expressions))
 	@inbounds for i in eachindex(expressions)
-		exprs[i] = ExpressionProcessing.expr_to_postfix(expressions[i], cacheFrontend)
+		exprs[i] = ExpressionProcessing.expr_to_postfix(expressions[i])
 	end
 	
 	variableCols = size(variables, 2) # number of variable sets to use for each expression
@@ -99,6 +98,7 @@ 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