Re: [go-nuts] WIKI: Assert Libraries for Testing

Thanks @kortschak! I understand your concerns, I work on the "both sides" too. The code (test) should be readable, easy to understand and a simple assertion can be more "clean way" that a long conditional if. A "ugly test" can be created with or without an assertion library. The concern about

Re: [go-nuts] WIKI: Assert Libraries for Testing

I have thoughts about the impact of assertion libraries in software engineering. I came from a background where they are commonplace into Go and in my earlier projects I used some the earlier iterations on them (go-check). While it's true that developers *can* use assertion libraries to provide ri

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

ctx.Err() really simplifies the whole process. I'll use it to optimize my task executor, thanks. On Wednesday, 12 January 2022 at 10:05:57 UTC Brian Candler wrote: > >> On Wednesday, 12 January 2022 at 08:41:23 UTC lege...@gmail.com wrote: >> >>> What I think it's not so good is that I must add t

Re: [go-nuts] Jobs

Linkedin, facebook, or this similar one? https://golang.cafe/ ありがとう On Thu, Jan 13, 2022 at 2:45 AM Alex Dvoretskiy wrote: > What is a good way to find Go developers and Go jobs nowadays? > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group.

Re: [go-nuts] profiling help

Thanks, Kurtis, The production version of this code runs as a regular web server. I was profiling in CGI just to simplify the configuration. Regards, Steve On Wed, Jan 12, 2022 at 5:34 PM Kurtis Rader wrote: > FWIW, I had the same suspicion as Robert. In my experience a CGI task that > takes

Re: [go-nuts] profiling help

FWIW, I had the same suspicion as Robert. In my experience a CGI task that takes less than, say, 200ms is going to be swamped by startup costs. It's usually better to use the FastCGI protocol

Re: [go-nuts] profiling help

Hi, Robert, The request *should* be super short, but it was actually taking 2.5 seconds. That was the whole reason I started trying to profile it, to figure out why a simple request was taking so long. Ian's suggestion of heap tracing found the issue for me: there was an unexpected allocation o

Re: [go-nuts] profiling help

Are you certain that the requests aren’t super short - so all you are measuring is the runtime startup time / and the overhead of parsing the CGI “protocol". This is not insignificant. CGI really only works well for long requests IMO. > On Jan 12, 2022, at 5:29 PM, Steve Roth wrote: > > Thank

Re: [go-nuts] profiling help

Thank you, Ian. From the function names, I suspected that the 70% chain was the garbage collector. But in this run, garbage collection was turned off with GOGC=off, and that was verified with GODEBUG=gctrace=1. So I thought perhaps they must be something else. I will proceed with heap profiling

[go-nuts] WIKI: Assert Libraries for Testing

Hello! Recently I learn the page TestComments on Golang Wiki (on Github). The section about Assert Libraries discourage the use of them. But I guess there's a little bit mistake

Re: [go-nuts] profiling help

On Wed, Jan 12, 2022 at 1:54 PM Steve Roth wrote: > > I am attempting to profile my code, and I'm unable to interpret the results. > So first, the meta-question is, what's the best forum to use to request help > with such things? This is a good place. See also https://golang.org/wiki/Question

[go-nuts] Re: profiling help

The 17% is sleeping. The 70% is garbage collection. On Wednesday, January 12, 2022 at 3:54:32 PM UTC-6 st...@rothskeller.net wrote: > I am attempting to profile my code, and I'm unable to interpret the > results. So first, the meta-question is, what's the best forum to use to > request help w

[go-nuts] profiling help

I am attempting to profile my code, and I'm unable to interpret the results. So first, the meta-question is, what's the best forum to use to request help with such things? The code I'm profiling is the server side of a moderately complex webapp. For simplicity, I've wrapped it with net/http/cgi a

Re: [go-nuts] Fatal error : on running go vet cmd

On Wed, Jan 12, 2022 at 1:17 PM Tejas Gowda wrote: > > I am using linux enviorment, installed go 1.6 1.16 rather than 1.6, I hope. What Linux distro? Ian > On Thursday, January 13, 2022 at 2:29:00 AM UTC+5:30 Ian Lance Taylor wrote: >> >> On Wed, Jan 12, 2022 at 10:58 AM Tejas Gowda wrote: >>

Re: [go-nuts] Fatal error : on running go vet cmd

I am using linux enviorment, installed go 1.6 On Thursday, January 13, 2022 at 2:29:00 AM UTC+5:30 Ian Lance Taylor wrote: > On Wed, Jan 12, 2022 at 10:58 AM Tejas Gowda wrote: > > > > # runtime/cgo > > _cgo_export.c:3:20: fatal error: stdlib.h: No such file or directory > > #include > > ^ > >

Re: [go-nuts] Fatal error : on running go vet cmd

On Wed, Jan 12, 2022 at 10:58 AM Tejas Gowda wrote: > > # runtime/cgo > _cgo_export.c:3:20: fatal error: stdlib.h: No such file or directory > #include > ^ > compilation terminated. That looks like you have a C compiler installed but no C library installed. Hard to say more

Re: [go-nuts] Convert a go.mod file into checked out dependencies

While not a tool, there is code that can be bent to this in golang.org/x/pkgsite/internal/source. I used that to get repo information for a tool to obtain homepage and issue page links from Go executables[1]. You could easily extend that kind of approach to get the actual repo at the relevant versi

Re: [go-nuts] Convert a go.mod file into checked out dependencies

Ah, yes, that would work but wouldn't include the git history... On Wednesday, January 12, 2022 at 12:28:49 PM UTC-8 robert...@gmail.com wrote: > https://go.dev/ref/mod#go-mod-vendor > > On Wed, Jan 12, 2022 at 10:58 AM Kevin Burke wrote: > >> Hi, >> Sometimes I just want to inspect third part

Re: [go-nuts] Convert a go.mod file into checked out dependencies

https://go.dev/ref/mod#go-mod-vendor On Wed, Jan 12, 2022 at 10:58 AM Kevin Burke wrote: > Hi, > Sometimes I just want to inspect third party code for a library, and/or > edit it. > > I'm looking for a tool that will read all of the dependencies in a go.mod > file and then check out all of the r

[go-nuts] Fatal error : on running go vet cmd

# runtime/cgo _cgo_export.c:3:20: fatal error: stdlib.h: No such file or directory #include ^ compilation terminated. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails f

[go-nuts] Convert a go.mod file into checked out dependencies

Hi, Sometimes I just want to inspect third party code for a library, and/or edit it. I'm looking for a tool that will read all of the dependencies in a go.mod file and then check out all of the right versions of all of the source code into the right places in a $GOPATH. Does that exist? Fail

[go-nuts] Jobs

What is a good way to find Go developers and Go jobs nowadays? -- 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. To view t

Re: [go-nuts] Golang JSONObject

On Wed, 22 Dec 2021 23:55:43 -0800 (PST) A JI wrote: > Why, when the object of struct is lowercase. I can't fill it and > convert to JSON ? > > https://go.dev/play/p/WZCvC7M5YAp > Is not the object of struct that affect the output of JSON, but the name of field. If the name of field start wit

Re: [go-nuts] Looping and tail-end code

On Wed, Jan 12, 2022 at 5:02 AM Tobias Klausmann wrote > So what is the *idiomatic* way of being able to use `continue` (or > something like it), yet have "always do this" code at the end of the > loop? As I understand it, `defer` only works for ends of functions, not > ends of blocks, and label

Re: [go-nuts] Looping and tail-end code

Hi! On Wed, 12 Jan 2022, Rob Pike wrote: > What's wrong with >for ;; time.Sleep(delay) { ... } > ? > > This technique is as old as the hills. Or at least as old as C for loops. Never been a C guy :) Thanks, that works perfectly! Best, Tobias -- You received this message because you are s

Re: [go-nuts] Looping and tail-end code

What's wrong with for ;; time.Sleep(delay) { ... } ? This technique is as old as the hills. Or at least as old as C for loops. -rob On Wed, Jan 12, 2022 at 9:02 PM Tobias Klausmann wrote: > > Hi! > > Often with tools that poll something, you get code of this form: > > ``` > for { >

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

Based on this stackoverflow answer : - package main import ( "context" "fmt" "net" "time" ) const DNS_SERVER = "1.2.3.4:53" const TIMEOUT = 3 * time.Second func main() {

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

On Wed, Jan 12, 2022 at 11:03 AM jan.f...@gmail.com wrote: > Just a related observation. I don't think you need to have a select > statement to check if a context is cancelled. I think it is sufficient to > just check if ctx.Err() gives a result different from nil. > I believe you are right, the

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

On Wednesday, 12 January 2022 at 08:41:23 UTC lege...@gmail.com wrote: > What I think it's not so good is that I must add the select at all the > places the goroutine is waiting or looping > I don't think you do. Well-behaved functions which take a Context will return with an error if the cont

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

Just a related observation. I don't think you need to have a select statement to check if a context is cancelled. I think it is sufficient to just check if ctx.Err() gives a result different from nil. >From the API documentation for Context (https://pkg.go.dev/context#Context): // If Done is not

[go-nuts] Looping and tail-end code

Hi! Often with tools that poll something, you get code of this form: ``` for { r, err := doSomeCall() if err != nil { log.Printf("Some error:", err) continue } s, err := doSomeOtherCall(r) if err != nil { log.Printf(

Re: [go-nuts] Any good idea to stop the goroutine as soon as possible?

Hi Axel, thank you very much, your explanation of this problem is very detailed and solves my question. What I think it's not so good is that I must add the select at all the places the goroutine is waiting or looping, it makes the execution and scheduling part of the task scheduling system coupli