On Tue, Jan 28, 2020 at 8:33 AM nilsocket <nilsoc...@gmail.com> wrote:
> Attached two files main.c and main.go, > both try to compute fib(40), 20 times on `x` no.of threads/goroutines. > fib(40) is recursive. > Your benchmark is flawed. Goroutines are not threads. Also, the printing of the results is included in the times you measure. You're benchmarking i/o implementations of two libraries Measure single-threaded implementations without printf's and see what happens. > > *Prerequisites for C:* > > 1. libuv (https://github.com/libuv/libuv) > > > > *Compile*: > > - *C :* > - *Unoptimized:* > > * gcc main.c -lpthread -luv * > > > - *Optimized:* > gcc-O3 main.c -lpthread -luv > > > - *Go :* > - go build > > > *Run:* > > - > > *C:time UV_THREADPOOL_SIZE=x ./a.out // substitute `x` with physical core > count * > - > > *GO:./temp x // substitute `x` with physical core count * > > > Results: > > Thread CountC (Optimized)C (Unoptimized)GO > 1 4.38s 11.36s 11.7s > 4 1.12s 3.1s 2.9s > 8 1.1s 2.9s 2.7s > > > Laptop with 4 physical cores(8 logical cores). > > Why can't go provide Optimization flag? > I understand go developers want compiler to be simple, but the difference > seems too big to leave it out. > > But isn't there any possibility to abstract the complexity and provide > optimization flag? > > -- > 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/cec68183-27d1-47cc-b106-48766a2242e6%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/cec68183-27d1-47cc-b106-48766a2242e6%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/CAMV2RqothU1hn81sFf9eJdOQonLR2kZ_E7LwjC9KsJDYw4Hddg%40mail.gmail.com.
