\starttext

\def\test[#1]{#1 \space}

\dontcomplain

\startluacode
    statistics.starttiming()
    for i=1,1000 do
        context.startnointerference()
        for i=1,500 do
         -- context.test { i }
            context.test { context.delayed(i) }
        end
        context.stopnointerference()
    end
    context.test { statistics.stoptiming() }
\stopluacode

\stoptext
