enter
        },

        xAxis: {
            type: 'datetime',
            dateTimeLabelFormats: { // don't display the dummy year
                month: '%e. %b',
                year: '%b'
            },
            title: {
                text: 'Date'
            }
        },
        yAxis: {
            title: {
                text: 'Time (ms)'
            },
            min: 0
        },
        tooltip: {
            headerFormat: '<b>{series.name}</b><br>',
        },

        legend: {
         