setstream(1);
loop(10); NullKernel; D2H; streamsync; endloop(1);
loop(10); NullKernel; D2H; streamsync; endloop(1);
loop(100); NullKernel; D2H; streamsync; endloop(1);
loop(100); NullKernel; D2H; streamsync; endloop(1);
loop(1000); NullKernel; D2H; streamsync; endloop(1);
loop(1000); NullKernel; D2H; streamsync; endloop(1);
loop(10000); NullKernel; D2H; streamsync; endloop(1);
loop(10000); NullKernel; D2H; streamsync; endloop(1);