protected virtual void TimeToString(System.Text.StringBuilder sb)
{
if(frame > 0) sb.AppendFormat("{0:0000}", frame);
else sb.Append("****");
if(realtimeSinceStartup == 0f) {
sb.Append("@******");
} else {
sb.Append((realtimeSinceStartup < 0f) ? "+" : ">")
.AppendFormat("{f4}", Mathf.Abs(realtimeSinceStartup));
}
}