How to speed up tasks?

thanks for all the suggestions guys. i ended up distributing the spawning of jobs to work around the compute taking about as long as a spawn. like this:

@everywhere function divideconquer(r)
    @sync begin
        if length(r)>2
            m = div(length(r)-1, 2)
            @spawnat r[2] divideconquer(r[2:m+1])
            @spawnat r[m+2] divideconquer(r[m+2:end])
        elseif length(r)>1
            @spawnat r[2] foo(100)
        end
        foo(100)
    end
end

@fetchfrom workers()[1] divideconquer(workers());