Memory Leak Issue in Preview #1374

New Issue

MrUnknownDE · 2026-04-05T17:30:08+02:00

MrUnknownDE commented

2026-04-05 17:30:08 +02:00

Originally created by @Azio-Pantheon on 12/11/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

Windows

OS Version

windows 11

Additional system information

The leak exists in both windows and macos.

Printer

Any

How to reproduce

Slice a really large part with solid gyroid infill to use as much memory as possible.
Delete the large part. And slice a tiny part.

Actual results

If you slice a huge part then delete it and slice a tiny part. The memory usage stays high for the preview of the tiny part.

Normal memory usage when slicing a small part(260mb):

Memory usage when slicing a large part(12gb):

Memory usage when slicing a small part after a large part(6gb):

Memory usage when slicing another large part(44gb):

Memory usage when slicing the same small part again(20gb):

Expected results

Preview of a small part usually doesnt take over 1gb memory. Prior slice should not increase the memory usage of the current sliced preview

Project file & Debug log uploads

stanfordbunny.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @Azio-Pantheon on 12/11/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Windows ### OS Version windows 11 ### Additional system information The leak exists in both windows and macos. ### Printer Any ### How to reproduce 1. Slice a really large part with solid gyroid infill to use as much memory as possible. 2. Delete the large part. And slice a tiny part. ### Actual results If you slice a huge part then delete it and slice a tiny part. The memory usage stays high for the preview of the tiny part. Normal memory usage when slicing a small part(260mb): <img width="1039" height="725" alt="Image" src="https://github.com/user-attachments/assets/54d709b9-4980-4cd4-a519-672b26f48855" /> Memory usage when slicing a large part(12gb): <img width="1017" height="802" alt="Image" src="https://github.com/user-attachments/assets/ecda97cc-0667-491c-b07a-835ba0fda5b1" /> Memory usage when slicing a small part after a large part(6gb): <img width="1011" height="834" alt="Image" src="https://github.com/user-attachments/assets/37ce147e-9234-490b-b5c1-419b737c4197" /> Memory usage when slicing another large part(44gb): <img width="1053" height="829" alt="Image" src="https://github.com/user-attachments/assets/928a7689-79c2-49c5-8d4e-024dd0f6827c" /> Memory usage when slicing the same small part again(20gb): <img width="1029" height="839" alt="Image" src="https://github.com/user-attachments/assets/45f91483-dc56-4bec-82ec-fdb919be07f4" /> ### Expected results Preview of a small part usually doesnt take over 1gb memory. Prior slice should not increase the memory usage of the current sliced preview ### Project file & Debug log uploads [stanfordbunny.zip](https://github.com/user-attachments/files/24113020/stanfordbunny.zip) ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1374