Getting nanosecond time from adb shell?

I need some way of getting nanosecond time inside adb shell (to measure precise execution time of utilities). The %N in 'date +%s.%N' returns simply %N or N.

Before I been using botbrew shell to run date command from there (which had support for the nanoseconds precision -- date +%s.%N ). However now it seems to be inactive. No repository is maintained.