1452873 - performance issue with javascript game emulation

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Jan Willem]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0
Build ID: 20180408220126

Steps to reproduce:

Play this game: http://www.ssega.com/play/golden-axe/730#
Use the 'javascript emulator' to reproduce.


Actual results:

Sound is very choppy, hardly playable.
Collected some performance data:
https://perfht.ml/2EzE0nN


Expected results:

Should play ok, works on Chrome.

Comment 1

[Alice0775 White]

I can reproduce the choppiness sound on Nightly61.0a1 x64 Windowx10. But not on Chrome Dev67.

Comment 2

[Alice0775 White]

STR
1. Open http://www.ssega.com/play/golden-axe/730
2. Click on [Javascript Emulator] button and wait to finish ad-movie
3. Click on [Start Game] button
4. Click on table() under a picture
  --- observe, sound is choppy
5. Wait to finish logo animation and game title animation
  --- observe, sound is very choppy
6. Press [Enter] three times to select the number of players etc... so that the game will start
  --- observe, sound is very choppy, The animation of the game is also slow and choppy

Comment 3

[Nico Grunbaum [:ng, @chew:mozilla.org]]

I checked as far back as Firefox 51 and there are the same symptoms. The emulation speed (even in the silent part) is noticeably slower than Chrome. I am not sure this is a web audio problem as much as a performance issue. An emulator that is failing to deliver samples in a timely manner would exhibit choppy audio. Alex, would you mind double checking me before we move this to another component?

Comment 4

[Alex Chronopoulos [:achronop]]

Paul, would you like to check this with your quality measurements patches? It has been reported in Windows and OSX and I am reproducing in Linux. It's a fun test.

Comment 5

[Paul Adenot (:padenot)]

Looks like we're too slow to feed audio on time. Let's send that over to graphics.

Comment 6

[jigtu]

Steam Deck is a great way to bring your Steam library along with you wherever you go. Proton allows you to play Windows with it, and also allows for emulation. Many people only play on consoles so the Steam Deck is the best way to get games that aren’t available on console. There are also a few that won’t be coming to console. Every gaming platform is tested, with the Playdate the next. I have enjoyed playing a lot of Steam Deck games in the past few weeks. I was amazed at how different games adapt to Steam Deck and how Steam Deck lets me play games that I’ve never tried before.

https://www.shareway.today/get-best-steam-deck-games-on-consoles-and-more/