response.appendContentString(" <span style=\"color:rgb(150,150,150)\">|</span> ");
PFStatsNode.DurationCount oneMS = rootStats.countBetweenDurations(0, 1000000);
PFStatsNode.DurationCount tenMS = rootStats.countBetweenDurations(1000000, 10 * 1000000);
PFStatsNode.DurationCount hundredMS = rootStats.countBetweenDurations(10 * 1000000, 100 * 1000000);
PFStatsNode.DurationCount moreMS = rootStats.countBetweenDurations(100 * 1000000, Long.MAX_VALUE);
float maxHeight = 20;
response.appendContentString("<style>#pf_histogram .pf_histogram_details { display: none; } #pf_histogram:hover .pf_histogram_details { display: block; }</style>");
response.appendContentString("<span id=\"pf_histogram\">");
response.appendContentString("<span style=\"background-color:rgb(200,200,200);margin:0px;padding:0px;width:10px;display:inline-table;font-size:0pt;height:" + (maxHeight * oneMS.millis() / total) + "px;\"> </span>");