Sometimes `println` in Juno doesn't work well. This is a simple example.

juno_println.jl

versioninfo()

function busysleep(t)
    T = time()
    while -T+time()<t
    end
end

begin
    sleep(0.1)
    println("A1", "A2")
end

begin
    sleep(0.5)
    println("B1", "B2")
end

begin
    busysleep(0.1)
    println("C1", "C2")
end

begin
    busysleep(0.5)
    println("C1", "C2")
end