Hi Stephen, I haven't really looked at your code in detail but one obvious difference between your version and the original is the rendering code. Are you certain that the slowness is not confined to your rendering code (I have no reason to believe it is btw)?
Here is a suggestion. I have had a good experience using a 2d library called ebiten (https://github.com/hajimehoshi/ebiten). It abstracts the rendering and can target native or browsers via wasm. In my experience performance when targeting the browser has been acceptable, so you could write an implementation of television.PixelRenderer backed by ebiten. You could then compile both to native and wasm and see if there is still a big performance difference? HTH Arnaud On Sat, 4 Sept 2021 at 11:12, Stephen Illingworth <stephen.illingwo...@gmail.com> wrote: > > I don't think I'm going to be able to make any progress with this. I chopped > away enough code so that it compiles with TinyGo. It works but it's even > slower. > > I was hoping to find a way of profiling the WASM code but I see DWARF support > for WASM binaries is still a work in progress. > https://github.com/golang/go/issues/33503 I don't know enough about WASM to > be able to contribute to that issue unfortunately. > > Thanks to anyone who looked at this. > On Friday, 3 September 2021 at 11:20:26 UTC+1 stephen.t....@gmail.com wrote: >> >> To follow up on this I should clarify what my questions are: >> >> 1) How much of a performance drop (when compared to AMD64 for example) >> should I expect when compiling to the WASM target? >> >> 2) Is there anything obvious I can do to counter any performance drops? >> >> And I suppose this is a non-Go question, but: >> >> 3) I know nothing about WASM beyond the bare minimum. How can I profile and >> understand the compiled WASM binary? Is it possible to use the pprof tool in >> some way? >> >> >> On Fri, Sep 3, 2021 at 10:40 AM Stephen Illingworth >> <stephen.t....@gmail.com> wrote: >>> >>> >>> >>> >>> On Fri, Sep 3, 2021 at 10:15 AM Brian Candler <b.ca...@pobox.com> wrote: >>>> >>>> Could you explain a bit more about what you're comparing? >>>> >>>> - Is the wasm version running in a browser? If so, which one? Or have you >>>> got a way to run wasm directly on the host (in which case, what is it)? >>> >>> >>> Running it in Firefox (78.13.0esr) and Chromium (92.0.4515.159) >>> >>>> >>>> - How is the linux/amd64 version running, if it's not talking to a >>>> DOM-type environment? If the native version is still using syscall/js, >>>> then how is it doing so? Or is the native version in a different repo? >>>> >>>> - By "the parent emulator project" do you just mean web2600 itself? >>> >>> >>> Web2600 is using the emulation core of the parent project >>> >>> https://github.com/JetSetIlly/Gopher2600 >>> >>> The parent project runs on the desktop. It currently uses SDL and OpenGL >>> etc. but it is designed to allow different methods of presentation. >>> >>> Web2600 is using the core of the emulator (ie. the non-presentation parts) >>> and so doesn't use SDL or OpenGL. >>> >>> For presentation, the television package in the core emulation allows you >>> to register "PixelRenderers". So Web2600 adds itself as a pixel renderer. >>> The implemented SetPixels(), NewFrame() (etc.) functions will then talk to >>> the DOM as appropriate. >>> >>> The web version works but is just exceedingly slow by comparison. >>> >>> > -- > 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/6bb486eb-7481-4356-94cd-29c365c02416n%40googlegroups.com. -- 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/CAJ6cK1abWOrcv%3DWx-foEeDEqBCZro%2BEYgse_j4uwshBxyG2XJA%40mail.gmail.com.
