Re: [go-nuts] Re: Go 1.12.1 and Go 1.11.6 are released

[Michael Jones]

I don't have direct feedback on this, but I do have an observation based on
my own faster-sort code, which is that timing seems about the same, and
scaling seems different than this report.

The sorty_test.go file starts with "const N = 1 << 28" so we're talking
about sorting a 268,435,456-element array of ints. In that code, they are
uint32s and float32s, in mine, 64-bit ints. I should be slower, but
adjusting my benchmarks for this array size I see:

go standard library sort.Ints()
54669865378 ns/op
54.6 sec

my quicksort
21398838106 ns/op
21.3 sec (2.55x stdlib)

my parallel quicksort
5428725888 ns/op
5.4 sec (10.0x stdlib, 3.94x serial version on my 4 cpu macbook pro)

These are 64-bit values and 32-bit should is just slightly faster
5318033205 ns/op
5.3 sec

I don't see a slowdown here Go version to version. Of course 10x slower in
the standard library vs tuned parallel is unfortunate.

Michael

On Sun, Mar 17, 2019 at 4:35 PM Ian Lance Taylor  wrote:

> On Sun, Mar 17, 2019 at 1:46 PM Serhat Şevki Dinçer 
> wrote:
> >
> > I see a regression on speed with sorty tests (go test -short -gcflags
> '-B -s' -ldflags '-s -w') on my Intel Core i5-4210M laptop (also sortutil
> became faster, zermelo float became much slower):
>
> Please open an issue with full details.  Thanks.
>
> Ian
>
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-- 

*Michael T. jonesmichael.jo...@gmail.com *

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Re: [go-nuts] Re: Go 1.12.1 and Go 1.11.6 are released

[Ian Lance Taylor]

On Sun, Mar 17, 2019 at 1:46 PM Serhat Şevki Dinçer  wrote:
>
> I see a regression on speed with sorty tests (go test -short -gcflags '-B -s' 
> -ldflags '-s -w') on my Intel Core i5-4210M laptop (also sortutil became 
> faster, zermelo float became much slower):

Please open an issue with full details.  Thanks.

Ian

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[go-nuts] Re: Go 1.12.1 and Go 1.11.6 are released

[Serhat Şevki Dinçer]

Hi,

I see a regression on speed with sorty  
tests (go test -short -gcflags '-B -s' -ldflags '-s -w') on my Intel Core 
i5-4210M laptop (also sortutil became faster, zermelo float became much 
slower):

with *go 1.12.1*

Sorting uint32
sortutil took 18.64s
zermelo took 10.92s
sorty-2 took 17.10s
sorty-3 took 14.22s
sorty-4 took 12.36s
sorty-5 took 12.10s

Sorting float32
sortutil took 18.03s
zermelo took 14.57s
sorty-2 took 19.27s
sorty-3 took 15.82s
sorty-4 took 13.93s
sorty-5 took 13.90s

with *go 1.11.6* (consistent with 1.11.5)

Sorting uint32
sortutil took 25.18s
zermelo took 10.93s
sorty-2 took 15.85s
sorty-3 took 13.05s
sorty-4 took 11.27s
sorty-5 took 11.05s

Sorting float32
sortutil took 23.69s
zermelo took 8.89s
sorty-2 took 19.25s
sorty-3 took 15.42s
sorty-4 took 13.19s
sorty-5 took 13.09s


On Friday, March 15, 2019 at 12:13:07 AM UTC+3, Katie Hockman wrote:
>
> Hello gophers,
>
> We have just released Go versions 1.12.1 and 1.11.6, minor point releases.
>
> These releases include fixes to cgo, the compiler, the go command,
>
> and the fmt, net/smtp, os, path/filepath, sync, and template packages.
>
> View the release notes for more information:
> https://golang.org/doc/devel/release.html#go1.12.minor
>
> You can download binary and source distributions from the Go web site:
> https://golang.org/dl/
>
> To compile from source using a Git clone, update to the release with
> "git checkout go1.12.1" and build as usual.
>
> Thanks to everyone who contributed to the release.
>
> Cheers,
> Katie for the Go team
>
>

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[go-nuts] Re: Go 1.12.1 and Go 1.11.6 are released

[Guanhua Jiang]

Thanks for the note! Was hoping `math/pi` package to have been added on
this date! :)

On Thu, Mar 14, 2019 at 2:16 PM Katie Hockman  wrote:

> Hello gophers,
>
> We have just released Go versions 1.12.1 and 1.11.6, minor point releases.
>
> These releases include fixes to cgo, the compiler, the go command,
>
> and the fmt, net/smtp, os, path/filepath, sync, and template packages.
>
> View the release notes for more information:
> https://golang.org/doc/devel/release.html#go1.12.minor
>
> You can download binary and source distributions from the Go web site:
> https://golang.org/dl/
>
> To compile from source using a Git clone, update to the release with
> "git checkout go1.12.1" and build as usual.
>
> Thanks to everyone who contributed to the release.
>
> Cheers,
> Katie for the Go team
>
> --
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