Sorry, I think the change I was thinking of was macOS specific, and in any case 
it’s in Go 1.10.

On 24 May 2018, at 11:15, ran...@gmail.com<mailto:ran...@gmail.com> wrote:

What has been changed? And since when? I may need dig into it for more detail.

I've tested on both 1.10 and devel +65c365bf0f Wed May 23 23:51:30 2018 +0000 
linux/amd64, the result is the same (slow).

On Thursday, May 24, 2018 at 4:37:47 PM UTC+8, Jakob Borg wrote:
Are you using the latest version of Go? time.Now() has been optimized recently.

On 24 May 2018, at 10:08, ra...@gmail.com wrote:

I been working on something performance intensive lately, one feature of it 
require me to calculate the time gap between operation which require time.Now 
to make time marks.

After I benchmark time.Now on my computer, I found that the time.Now takes 
about 3758 ns to perform one operation, which is not very fast. The benchmark 
is here<https://gist.github.com/reinit/82608ab20e5aac3bd3c1eb5a8f78d23c> 
(benchmarked on my Ubuntu 18.04 LTS machine).

So, I want to know is that normal to be this slow? If it is (slow), then does 
there is an alternative way to to that?

Thank you!

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