halide/Halide — pull request #157 by steven-johnson (2013-09-12 17:50:06+00:00)
Title: Upgrade clocks to nsec resolution

Replace halide_current_time() and halide_current_time_usec() with
halide_current_time_ns(), which returns time in nanosecond increments.

Add linux_clock.cpp, which uses clock_gettime() instead of
gettimeofday() [and actually provides ns resolution].

Have Android use linux_clock.cpp by default.