Downgrading to 1.6.3, I'm also getting consistent benchmark results. I'll try 1.7 on my Mac at home later today, to see if it's a 1.7 thing or a Windows thing or...?
On Wednesday, 3 August 2016 14:55:20 UTC+1, C Banning wrote: > > PS - that's with Go v1.6. > > On Wednesday, August 3, 2016 at 7:49:49 AM UTC-6, C Banning wrote: >> >> On MacBook Pro, 2.6 GHz Intel Core i7, 8 GB 1600 MHz memory, running OS X >> 10.11.6, your benchmarks look pretty consistent: >> >> >> BenchmarkStart-4 2000000000 1.45 ns/op >> >> BenchmarkEnd-4 2000000000 1.47 ns/op >> >> BenchmarkHereThere-4 2000000000 1.46 ns/op >> >> BenchmarkStartEnd-4 2000000000 1.46 ns/op >> >> BenchmarkEndStart-4 2000000000 1.46 ns/op >> >> BenchmarkFirst-4 2000000000 0.59 ns/op >> >> BenchmarkSecond-4 2000000000 0.59 ns/op >> >> BenchmarkLast-4 2000000000 0.59 ns/op >> >> BenchmarkPenultimate-4 2000000000 0.58 ns/op >> >> On Wednesday, August 3, 2016 at 5:56:32 AM UTC-6, Ondrej wrote: >>> >>> I wanted to see if there was a difference when loading values from a >>> large-ish slice (10000 elements) - to see if caches, locality and other >>> things had any meaningful impacts. Whilst individual value loading (just a >>> single element) seemed to be equally fast regardless of element position >>> (see bench of First, Second, Last, Penultimate), when combining loading of >>> various values, there seem to be almost a 2.5x difference between loading >>> first four values and loading last four values (first two benchmarks). >>> Loading the same values, just in different order, also yields different >>> execution times. But alternating loading (0, n, 1, n-1) seems to be faster >>> than loading first two values and last two values. >>> >>> (Setting the test slice to be an array instead wipes all differences >>> between benchmarks.) >>> >>> Can anyone point me to a resource - be it Go specific or on computer >>> science principles - that would explain these large differences? >>> >>> Thanks! >>> >>> https://play.golang.org/p/oMqDvXI9YW >>> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
