Date and time
- now
- now.sec
- time.elapsed
- time.elapsed.msec
- time.elapsed.msec_frac
- time.elapsed.sec
- time.elapsed.usec
- time.elapsed.usec_frac
- time.end
- time.end.msec
- time.end.msec_frac
- time.end.sec
- time.end.usec
- time.end.usec_frac
- time.start
- time.start.msec
- time.start.msec_frac
- time.start.sec
- time.start.usec
- time.start.usec_frac
- time.to_first_byte