Setting GODEBUG=inittrace=1 will log a trace of init function execution, which you can use to determine if init is slow, and if so which packages.
e.g., `GODEBUG=inittrace=1 go version` ends with "init main @9.5 ms", indicating that it look 9.5ms to run all init functions. The format is described at https://pkg.go.dev/runtime#hdr-Environment_Variables. On Wed, Aug 31, 2022 at 3:00 AM ag9920 <jingong.w...@gmail.com> wrote: > Hi, recently I've been trying to make my unit test faster. It seems too > much time were spent on initialization. After removing all init() function > in relevant packages. The speed was still very slow.It even takes dozens of > seconds before entering my real unit test function. > > So I take a look at all the possible factors that might slow down the > testing. The only possible reason I can think of is the time cost on > import. Golang needs to import all packages recursively. And in my > scenario, that's roughly dozens of packages.Maybe initializing const, var > takes too much time. > > Is there any solution that could help me figured out the reason? I didn't > find any tools that could tell me the time cost on import several packages. > > And if that's the case, import a package does take much time, is it still > possible for me to speed up my unit test? > > > -- > 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/cd58955e-0c4b-4d56-afd7-1153d7be06dcn%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/cd58955e-0c4b-4d56-afd7-1153d7be06dcn%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/CALoThU9aog7qArW8%3DfHQ6QL5gA%3DAV1136Mib0d3EOeJsfXv3oQ%40mail.gmail.com.
