@time every evaluation in repl

General Usage
3

The most minimal way to do this is probably

julia> push!(Base.active_repl_backend.ast_transforms, ast -> :(t = time(); r = $(ast); Base.eval(Main, :(last_time = $(time() - t))); r))
2-element Vector{Any}:
 softscope (generic function with 1 method)
 #7 (generic function with 1 method)

julia> sleep(2)

julia> last_time
2.0292770862579346
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