[web] ImageDecoder should be more memory-efficient #96145
Description
Branching off the memory efficiency issue from #94500. While the leak associated with the Codec objects has been fixed, ImageDecoder still uses a lot more memory when decoding multiple animated images simultaneously (i.e. all codecs are live by design and there are no objects to reclaim) compared to plain <img> tags or WASM codecs used by CanvasKit. For example, the WASM codec never grows past 150MB, while ImageDecoder can easily grow to 600-700MB when stressed.
This may require a fix in Chromium (plain JS repro, see also #94500 (comment)).
Repro using Flutter:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Animated image stress test',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
const List<String> urls = <String>[
'https://media4.giphy.com/media/Ve1cBYXUmh6iyuYSnF/giphy.webp',
'https://media3.giphy.com/media/fZ31GBoN4EOUb83rIt/giphy.webp',
'https://media4.giphy.com/media/wP4T2q2sb9vqgz4GZ1/giphy.webp',
'https://media1.giphy.com/media/RgGfMHu2HLKLwGeGFb/giphy.webp',
'https://media0.giphy.com/media/3o7TKtpfZ3e8rwww7K/giphy.webp',
'https://media1.giphy.com/media/4nKnhZsY9mNX9n928r/giphy.webp',
'https://media4.giphy.com/media/8Rqk3cKgw799pM8U1a/giphy.webp',
'https://media3.giphy.com/media/3ov9jSfDqguXOoLfhu/giphy.webp',
'https://media4.giphy.com/media/yh4Q1Hft8zzUgzOybI/giphy.webp',
'https://media4.giphy.com/media/SF9v8zMYhyvLn9GTTH/giphy.webp',
'https://media0.giphy.com/media/BwPYESM1eTKgozrKnT/giphy.webp',
'https://media2.giphy.com/media/Gx9iROMAiZmFtAopIJ/giphy.webp',
'https://media1.giphy.com/media/wyyqRSqoWGSiP66G6a/giphy.webp',
'https://media2.giphy.com/media/SWUneSnAJCgy1qSfNG/giphy.webp',
'https://media0.giphy.com/media/l6oX5SS8vA5n7GSXG2/giphy.webp',
'https://media2.giphy.com/media/QBpi7TeiDCgQ59VH1O/giphy.webp',
];
return Scaffold(
appBar: AppBar(
title: const Text('Animated image stress test'),
),
body: GridView.count(
primary: false,
padding: const EdgeInsets.all(20),
crossAxisSpacing: 10,
mainAxisSpacing: 10,
crossAxisCount: 4,
children: <Widget>[
for (int i = 0; i < 50; i++)
for (String url in urls)
Image.network(url),
],
),
);
}
}