also, if you find any odd behavior, or API issues, or possible improvements, etc... feel free to reach out on the gonum mailing list: - gonum-...@googlegroups.com
(feel free to also reach out if Gonum did a good job at fulfilling your use case :P) -s ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Saturday, February 20th, 2021 at 8:13 PM, TiT8 <lorenzope...@gmail.com> wrote: > Awesome !! Thank you. > > Il giorno sabato 20 febbraio 2021 alle 19:59:37 UTC+1 DrGo ha scritto: > > > Dear Lorenzo,Here’s a link to an old but still relevant tutorial on > > benchmarking Go programs > > > > https://dave.cheney.net/2013/06/30/how-to-write-benchmarks-in-go > > > > Happy benchmarking > > > > On Saturday, February 20, 2021 at 11:19:40 AM UTC-6 TiT8 wrote: > > > > > Thank you Volker. > > > > > > I want to say that I was not trying to benchmark the two version of Go > > > (two weeks ago I had go1.15.8, now 1.16). At the beginning I was trying > > > to do some linear algebra with Go as a free “alternative of Matlab”, so I > > > noted the difference between the exe coming from the two versions.Now I > > > have understand that this is not the way to measure the specific > > > performance of my issue. I will learn more and also testing. > > > > > > Sorry for your time, but thank you very much for your fast help.Il giorno > > > sabato 20 febbraio 2021 alle 17:31:24 UTC+1 Volker Dobler ha scritto: > > > > > > > (premature send, sorry) > > > > > > > > 4. Your matrix multiplication is just a few CPU instructions, it is > > > > hardto measure something tiny reliable. So use larger matrixes.5. You > > > > are benchmarking also how fast you can format and outputthe results to > > > > stdout. This might or might not be intentional butprobably is just > > > > wrong.6. There is no point in comparing Go 1.15 and Go 1.16 with > > > > microbenchmarkswhich do not properly measure what you think they do. > > > > Your code spendsfar too much time in a lot of things. Come up with a > > > > _proper_ benchmarkbased on testing.B and go test. Make sure this > > > > benchmark is stable. Makesure this benchmarks really benchmarks what > > > > you are trying to measure.Then redo the benchmarks 10 times and compare > > > > them doing properstatistics. > > > > > > > > V. > > > > > > > > On Saturday, 20 February 2021 at 15:48:32 UTC+1 TiT8 wrote: > > > > > > > > > Hello everyone,I'm Lorenzo and I'm not a computer scientist, I have > > > > > used some "Matlab" and I am new with Go (surprisingly fast, simple > > > > > and elegant). > > > > > > > > > > I'm trying to do some basic operation on matrix with the "Gonum" > > > > > package using vectorization. I was curious about the speed of > > > > > development and the performance (repeat... surprisingly for me!). So > > > > > I've tried to do some measures: > > > > > > > > > > package mainimport ( "fmt" "time" > > > > > "gonum.org/v1/gonum/mat")func main() { p := mat.NewDense(3, 3, > > > > > nil) a := mat.NewDense(3, 3, []float64{ 1, 2, 3, 1, 2, 3, > > > > > 1, 2, 3, }) start := time.Now()p.Mul(a, a) // element-wise > > > > > fmt.Printf("%v\n", mat.Formatted(p, mat.Prefix(""), mat.Squeeze())) > > > > > p.Add(a, a) fmt.Printf("%v\n", mat.Formatted(p, mat.Prefix(""), > > > > > mat.Squeeze())) p.MulElem(a, a) fmt.Printf("%v\n", > > > > > mat.Formatted(p, mat.Prefix(""), mat.Squeeze())) > > > > > fmt.Println(time.Since(start))} > > > > > > > > > > Well... when I run the "go run mat.go" command the result time is > > > > > about 150 microseconds, but when I run "go build" and then execute > > > > > the binary the result time is about 4 milliseconds. This happen when > > > > > I use go1.16. > > > > > > > > > > When I use go1.15.8, on the same code, the exe is faster (about 120 > > > > > microseconds) then the "go run mat.go" (about 180 microseconds). One > > > > > order of magnitude faster than go1.16 exe (and basic Matlab). > > > > > > > > > > So: > > > > > > > > > > - am I in error with the code (sorry, it's all new for me)? If yes, > > > > > where is my fault? > > > > > - if the "benchmark" was correct, why go1.16 build executable is > > > > > slower than go1.15.8 exe and "go run" command? > > > > > - Is it my machine's fault or Gonum package or what? > > > > > - Do you also have these values? > > > > > > > > > > My pc: HP ELITEBOOK 8560w Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz, > > > > > 2201 Mhz, 4 Core(s), 8 Logical Processor(s) x64.I am on the Windows > > > > > Subsystem Linux 2. > > > > > > > > > > Sorry for my English, I hope you understand my issue, thank you for > > > > > the attention > > -- > > 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/b7b558d9-d14c-4ba7-bcb8-977015e01bfdn%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. 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