Stopwatch

// Measures elapsed time, from the runtime's monotonic clock in nanoseconds.
public class System.Diagnostics.Stopwatch : System.Any
{
    field started: i64
    field elapsed: i64
    field running: bool
    static method Now() -> i64
    // Nanoseconds so far.
    method Nanoseconds() -> i64
    // The clock now, in ticks of Frequency.
    static method GetTimestamp() -> i64
    // The time from a timestamp to now, and between two.
    static method GetElapsedTime(start: i64) -> System.TimeSpan
    static method GetElapsedTime(start: i64, end: i64) -> System.TimeSpan
    static method StartNew() -> System.Diagnostics.Stopwatch
    method Start() -> void
    method Stop() -> void
    method Reset() -> void
    method Restart() -> void
    // Ticks of GetTimestamp and ElapsedTicks per second (they are nanoseconds).
    static property Frequency: i64
    static property IsHighResolution: bool
    property IsRunning: bool
    property Elapsed: System.TimeSpan
    property ElapsedMilliseconds: i64
    property ElapsedTicks: i64
}