Thanks for point it out Brian. I must of had some background interference. I re-ran the tests, Go was the same, Java is
Benchmark Mode Cnt Score Error Units TestJavaDispatch.TestArrayDispatch avgt 9 4367.196 ± 50.227 ns/op TestJavaDispatch.TestDispatch avgt 9 0.942 ± 0.005 ns/op TestJavaDispatch.TestIDispatch avgt 9 1.341 ± 0.040 ns/op So the error is much less. > On Jun 21, 2024, at 2:14 PM, Robert Engels <reng...@ix.netcom.com> wrote: > > Yep. Haven’t dig into it. I assume it has to do with allocations. That it is > 2x faster than Go is somewhat suspect as well. > > I was more sharing for the change in Go performance. > >> On Jun 21, 2024, at 2:11 PM, 'Brian Candler' via golang-nuts >> <golang-nuts@googlegroups.com> wrote: >> >> > 4775.994 ± 13310.309 >> >> Those are pretty wide error bars though... >> >> On Friday 21 June 2024 at 17:15:05 UTC+1 Robert Engels wrote: >> I had the opportunity to revisit my interface dispatch benchmark >> (https://github.com/robaho/go-dispatch-test >> <https://github.com/robaho/go-dispatch-test>). >> >> Previously, the dispatching using pointer receivers was nearly 3x slower >> (i.e. 5.5 ns to 12.6 ns): >> >> goos: darwin >> goarch: amd64 >> pkg: github.com/robaho/go-dispatch-test >> <http://github.com/robaho/go-dispatch-test> >> BenchmarkIDispatch-8 300000000 5.56 ns/op >> BenchmarkDispatch-8 2000000000 1.57 ns/op >> BenchmarkArrayParms-8 200000 9265 ns/op >> PASS >> >> and >> >> goos: darwin >> goarch: amd64 >> pkg: github.com/robaho/go-dispatch-test >> <http://github.com/robaho/go-dispatch-test> >> BenchmarkIDispatch-8 100000000 12.6 ns/op >> BenchmarkDispatch-8 2000000000 1.57 ns/op >> PASS >> >> >> With the latest Go 1.22.4, the performance difference has reversed ! (tests >> have been combined for simplicity). >> >> goos: darwin >> goarch: amd64 >> pkg: github.com/robaho/go-dispatch-test >> <http://github.com/robaho/go-dispatch-test> >> cpu: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz >> BenchmarkIDispatch-8 535263746 2.118 ns/op >> BenchmarkIDispatchPtr-8 675721244 1.773 ns/op >> BenchmarkDispatch-8 1000000000 0.6953 ns/op >> BenchmarkArrayParms-8 184212 6440 ns/op >> PASS >> >> Pretty impressive work. The interface based dispatch is almost equal to the >> Java version now: >> >> Benchmark Mode Cnt Score Error Units >> TestJavaDispatch.TestArrayDispatch avgt 3 4775.994 ± 13310.309 ns/op >> TestJavaDispatch.TestDispatch avgt 3 0.941 ± 0.088 ns/op >> TestJavaDispatch.TestIDispatch avgt 3 1.331 ± 0.146 ns/op >> >> -- >> 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 >> <mailto:golang-nuts+unsubscr...@googlegroups.com>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/57b5e091-f309-4d5f-b102-f58c3d344776n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/golang-nuts/57b5e091-f309-4d5f-b102-f58c3d344776n%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 > <mailto:golang-nuts+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/6E7B8F20-45AE-462F-85FD-7A30A77806C7%40ix.netcom.com > > <https://groups.google.com/d/msgid/golang-nuts/6E7B8F20-45AE-462F-85FD-7A30A77806C7%40ix.netcom.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/D940D5A5-7313-4E2F-B048-E32AA6B402BE%40ix.netcom.com.
