@init is slow

[hhaensel]

model = @init is slow compared to calling the functions directly.
MWE:

using GenieFramework
@genietools

@clear
@in a = 1
@in s = "hello"

@handlers begin
    @onchange a begin                                                                                                                                                                                  
        println("a in 1:10: ", a in 1:10)                                                                                                                                                               
        println("a: ", a in 1:10)                                                                                                                                                               
    end
end

function init_macro()
    model = @eval(@init())
end

function init_direct()
    model = __GF_AUTO_HANDLERS__(init(Main_ReactiveModel))
end

julia> @time init_macro()
  0.001252 seconds (1.20 k allocations: 124.344 KiB, 0.04% compilation time)
var"##Main_ReactiveModel!#323"("GICFHUSCRBJAGRREMGWHFKNZERQIMZXV", LittleDict{Symbol, Any, Vector{Symbol}, Vector{Any}}(), Reactive{Bool}(Observable(false), 1, false, false, ""), Reactive{Bool}(Observable(false), 1, false, false, ""), Reactive{Int64}(Observable(1), 1, false, false, "Untitled-2:5"), Reactive{String}(Observable("hello"), 1, false, false, "Untitled-2:6"))

julia> @time init_direct()
  0.000327 seconds (113 allocations: 6.922 KiB)
var"##Main_ReactiveModel!#323"("AHPGLQNFMPFRSSCXHMRIYEKFANYJRUNS", LittleDict{Symbol, Any, Vector{Symbol}, Vector{Any}}(), Reactive{Bool}(Observable(false), 1, false, false, ""), Reactive{Bool}(Observable(false), 1, false, false, ""), Reactive{Int64}(Observable(1), 1, false, false, "Untitled-2:5"), Reactive{String}(Observable("hello"), 1, false, false, "Untitled-2:6"))

[hhaensel]

There was an world age problem in @init´ in my PR #159, which needed invokelatest()`. I fixed this just now and added a case distinction. Now things are a bit faster.

julia> @time init_macro();
  0.000408 seconds (471 allocations: 38.391 KiB)

julia> @time init_direct()
  0.000281 seconds (113 allocations: 6.922 KiB);

This is probably acceptable

[hhaensel]

We could, however, define a start function, that has a fallback routine and defines a specialised function for future use ...