On Fri, Dec 2, 2022 at 8:13 PM Diogo Baeder <diogobae...@gmail.com> wrote:
> Hi guys, > > I've been working on some experiments with different web application > stacks to check their performances under a specific scenario: one in which > I have to make several concurrent requests and then gather the results > together (in order) and throw them out as JSON in the response body. (This > project is only an experiment, but it's informing me for decisions that > have to be made for a real-world project where we have a similar scenario.) > > However, probably due to my ignorance in Go, I cannot make it perform as > well as I expected - actually the best I'm getting are results that are > even slower than Python, which was a surprise to me. Here they are: > https://github.com/yougov/concurrency-tests#edit-13-added-golang-with-gin > > So, looking at the code here: > https://github.com/yougov/concurrency-tests/blob/master/stacks/goapp/main.go > - does anybody see any problem in the implementation that could be hurting > performance? I tried using a WaitGroup, tried sharing memory (nasty, I > know, but just for the sake of experimentation), tried multiple JSON > codecs, different web frameworks, and nothing worked so far. I have a > feeling that I'm doing something fundamentally wrong and stupid, and that > somehow I can make a small change to make the experiment much faster. > Have you measured how much time is spent on the http.Get calls? It is likely that the 50 concurrent http.Get calls is the bottleneck. Also note that you don't need a channel there. You can simply use a waitgroup and set the results from inside the goroutine, because each goroutine knows the index. But that is unlikely to change anything measurable when compared to the Get calls. > > Thanks in advance, I'm sure this will help me learning more about the > language! :-) > > Cheers! > > -- > 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 this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/42d7d04f-f6d8-4d96-bcdf-bcf32b99a73cn%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/42d7d04f-f6d8-4d96-bcdf-bcf32b99a73cn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAMV2Rqp5RVqdBj_6oQgEuZo76eS-n4VQNk%2BBE4ed8%3D7Y2zavCQ%40mail.gmail.com.
