I'm using Uber's zap logger in production systems ( https://github.com/uber-go/zap). It is designed to emit structured JSON logs and do the minimal amount of allocations possible. It's a completely different interface from Go's log package, but that is where the efficiency comes from. I'd highly recommend it, and the JSON logs are easy to ingest into services like Datadog or Sumologic.
-- Marcin On Mon, Mar 9, 2020 at 9:52 AM Vasiliy Tolstov <v.tols...@selfip.ru> wrote: > > > пн, 9 мар. 2020 г. в 19:36, Axel Wagner <axel.wagner...@googlemail.com>: > >> IMO, there really isn't a super good answer. The simple answer is: You >> need to delay the actual `fmt.Sprintf` call as long as possible. Which >> generally means, that the interface you consume (to allow the user to >> direct and configure logging) will need to reflect formatting and all kinds >> of things that the user actually doesn't want to deal with. So it's hard to >> find a good tradeoff between API simplicity and usability and not >> allocating in this case. >> >> Another, maybe unforseen problem, is that you don't want logging to >> interfere with production. It's a painful lesson to learn, that synchronous >> logging can take down a production service with ease. If you want to be >> prepared for that and reduce the runtime overhead of logging, you will have >> to make it asynchronous. But that's fundamentally at odds with the above >> goal of delaying formatting - the user will usually not expect arguments to >> loggers to be used after the logging call returns. Buffering a formatted >> string avoids that of course. >> >> > Thanks! So i think that most simple case is check each time log level , > and output log only if level satisfied. > -- > Vasiliy Tolstov, > e-mail: v.tols...@selfip.ru > > -- > 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/CACaajQshiJaz%2BAJ_Tm5VbTW8FDfP0QyLvzj_KCGDTAM7RpiPrg%40mail.gmail.com > <https://groups.google.com/d/msgid/golang-nuts/CACaajQshiJaz%2BAJ_Tm5VbTW8FDfP0QyLvzj_KCGDTAM7RpiPrg%40mail.gmail.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/CA%2Bv29LsSkRBtJfR9CAhsy1OJnaGTwFMe89oq4VowzQ7hTsJwtQ%40mail.gmail.com.
