# Is there an efficient way to associate a value with a parameterized type.For exa
**URL:** https://discourse.julialang.org/t/is-there-an-efficient-way-to-associate-a-value-with-a-parameterized-type-for-exa/54940
**Category:** General Usage
**Created:** [February 9, 2021, 4:16pm UTC](https://discourse.julialang.org/t/is-there-an-efficient-way-to-associate-a-value-with-a-parameterized-type-for-exa/54940 "2021-02-09T16:16:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@BridgeBot](https://discourse.julialang.org/u/BridgeBot)
#### Post date: [February 9, 2021, 4:16pm UTC](https://discourse.julialang.org/t/is-there-an-efficient-way-to-associate-a-value-with-a-parameterized-type-for-exa/54940/1 "2021-02-09T16:16:23Z")
Is there an efficient way to associate a value with a parameterized type.
For example:
`struct GaloisField{p,r}; val::Int end`
```julia
+(a::G, b::G} where G<:GaloisField = addop(a.val, b.val, logtable(G))
```
Memoization of `logtable` or using a global dictionary is not fast enough.
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### Author:  [@klacru](https://discourse.julialang.org/u/klacru)
#### Post date: [February 10, 2021, 5:49pm UTC](https://discourse.julialang.org/t/is-there-an-efficient-way-to-associate-a-value-with-a-parameterized-type-for-exa/54940/2 "2021-02-10T17:49:14Z")
The following post of @benoitrichard gave the solution:
I think what you need is a generated function then
@generated function logtable(::Type{G}) where {p, r, G \<: GaloisField{p, r}}
lg = \_logtable(p, r) # The actual computation
return :($lg)
end
That way the actual logtable will be comptued only once per type