bors 2216eceea5 auto merge of #14216 : kballard/rust/macos_precise_time_ns, r=alexcrichton ... Use sync:1️⃣:Once to fetch the mach_timebase_info only once when running precise_time_ns(). This helps because mach_timebase_info() is surprisingly inefficient. Also fix the order of operations when applying the timebase to the mach absolute time value. This improves the time on my machine from ``` test tests::bench_precise_time_ns ... bench: 157 ns/iter (+/- 4) ``` to ``` test tests::bench_precise_time_ns ... bench: 38 ns/iter (+/- 3) ``` and it will get even faster once #14174 lands.		2014-05-16 16:31:24 -07:00
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lib.rs	auto merge of #14216 : kballard/rust/macos_precise_time_ns, r=alexcrichton	2014-05-16 16:31:24 -07:00