[syncfusion_flutter_pdfviewer] Out of Memory on large PDF Files

[francescovallone]

Bug description

When using the library on an iPad and attempting to load a large PDF file (300 MB), the application crashes or freezes completely.
The difference in behavior is related to the use of .file or .memory.

In both cases, the problem is related to the fact that the 300 MBs are instantly added to the heap stack, causing the application to run out of memory.

I also tried to stream the content of the file to the viewer but it failed miserably 😢

Steps to reproduce

Use .file or .memory named constructor to create a PdfViewer and load a large file (300MB)

Code sample

Code sample

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Screenshots or Video

Screenshots / Video demonstration

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Stack Traces

Stack Traces

On which target platforms have you observed this bug?

iOS, Android

Flutter Doctor output

Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.32.8, on macOS 15.4.1 24E263 darwin-arm64, locale it-IT)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 16.3)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.3)
[✓] VS Code (version 1.103.2)
[✓] Connected device (3 available)
[✓] Network resources

• No issues found!

[francescovallone]

Tested and found it also on Android

[immankumarsync]

@francescovallone, we suspect that the out-of-memory issues are specific to PDF documents. Could you please share the PDF document in which you noticed the memory issues? This will help us validate the case based on the type of documents being used.

[francescovallone]

@immankumarsync unfortunately I can't share the document. If you tell me how to analyze it to help you out I'm more than happy to do it