vuex
                                
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                        mapState(["key1", {key2 :'key3'})
.map(key => ({ key, val: key }))
.reduce((acc, cur)=> {acc.push({ key: cur, val: cur}); return acc}, [])
I'm not aware of the performance issues Is there a relatively big impact(reduce / map)
ormapState(["key1"],  {key2 :'key3'}, ...)