Repository navigation
[flutter_svg] Use a lot of memory to compile svgs on iOS #184564
Description
Steps to reproduce
Run code in profile mode, iOS, open memory tool, press button
Expected results
Do not use too much memory to compile svg
Actual results
Use a lot of memory (1.3 GB) and the process is very slow
Code sample
Code sample
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
class TestApp extends StatefulWidget {
const TestApp({super.key});
@override
State<TestApp> createState() => _TestAppState();
}
class _TestAppState extends State<TestApp> {
bool show = false;
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
show = !show;
});
},
),
body: !show ? SizedBox() : SingleChildScrollView(
child: Column(
children: List.generate(40, (e) {
return SvgPicture.network('https://icons.getbootstrap.com/assets/icons/building-fill-exclamation.svg?v=$e');
}),
),
),
),
);
}
}
flutter_svg: 2.2.4
Screenshots or Video
Screenshots / Video demonstration
[Upload media here]
Logs
Logs
[Paste your logs here]Flutter Doctor output
Doctor output
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.41.5, on macOS 26.3.1 25D2128 darwin-arm64, locale en-VN)
[!] Android toolchain - develop for Android devices (Android SDK version 36.1.0)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] Xcode - develop for iOS and macOS (Xcode 26.2)
[✓] Chrome - develop for the web
[✓] Connected device (4 available)
! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local area network as
this Mac.
The device must be opted into Developer Mode to connect wirelessly. (code -27)
! Error: Browsing on the local area network for iPhone. Ensure the device is unlocked and attached with a cable or associated with the same local area network as
this Mac.
The device must be opted into Developer Mode to connect wirelessly. (code -27)
[✓] Network resources
! Doctor found issues in 1 category.
Activity
saurabh-mirajkar commentedon Apr 6, 2026
@xuantungdev0401 Thanks for the detailed report.
I notice the SVG URL includes a changing query param (
?v=$e), which prevents caching and forces each SVG to be downloaded and compiled separately. This could significantly increase memory usage.To help us investigate further:
?v=$e)?Keeping this open for further investigation once we have the above details.
xuantungdev0401 commentedon Apr 6, 2026
Hi @saurabh-mirajkar
If only 1 url is used, the memory is not increased so much.
But we usually have many svg icons in 1 screen so the problem is still there.
Yes
I cannot capture snapshot but I have a image here
saurabh-mirajkar commentedon Apr 6, 2026
Thanks for the additional details. Labelling for
team-engineto investigate further.[flutter_svg] Add a byte budget for the compiled SVG cache (#13596)