| ID | Category [?] | Severity [?] | Reproducibility | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 08638 | Debugger | Minor | Have not tried | May 21, 2023, 00:10 | Mar 20, 2025, 15:19 |
| Tester | holub | View Status | Public | Platform | MAME (Self-compiled) |
| Assigned To | Resolution | Open | OS | MacOS X | |
| Status [?] | Direction Needed | Driver | |||
| Version | 0.253 | Fixed in Version | Build | 64-bit | |
| Fixed in Git Commit | Github Pull Request # | ||||
| Summary | 08638: MacOS debugger extremely slow | ||||
| Description |
Issue reproduced on MacOS but not on linux, Windows |
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| Steps To Reproduce |
> mame spectrum -d * open new memory view for program space * resize window |
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| Additional Information | |||||
| Github Commit | |||||
| Flags | |||||
| Regression Version | |||||
| Affected Sets / Systems | |||||
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Attached Files
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 mame.sample.txt (2,607,384 bytes) May 30, 2023, 13:17 Uploaded by holubsample output | ||||
 No.21454
holub Tester
May 21, 2023, 12:59
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It's not driver specific - same happens with amstrad |
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 No.21516
Tafoid Administrator
Jun 6, 2023, 16:38
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Is it a sudden onset (last version or two) or has it always been this way? Any way you could check some older builds? Opening this up to Direction Needed - I don't have access to MacOS. |
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No.21541
holub Tester
Jun 14, 2023, 16:29
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similar in 0.253 |
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No.21890
holub Tester
Dec 21, 2023, 16:45
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I suspected MacOS debugger doesn't disable side_effects somewhere but after some testing proved that's not the case. Apparently slowness comes from external OS calls not controlled by MAME at this moment. |
 No.21901
Robbbert Moderator
Jan 4, 2024, 18:44
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So, is this a MAME issue? Or not? I don't have a Mac to check this. |
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No.21906
holub Tester
Jan 11, 2024, 16:45
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It's hard to say "that's not MAME". Possibly there are some best practices for SDL calls we can apply to the layer, but that's beyond my expertise and I don't even have environment to properly test it. Report comes from my interaction with the user without development experience and in this situation is problemaric to guide him how to perform desired troublshooting. |
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No.22104
R. Belmont Developer
May 12, 2024, 20:53
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SDL interferes with the Cocoa event loop used by the debugger. This is what the Mac native OSD was intended to fix, but I can't get it to work and nobody with Cocoa experience has helped. |
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No.22395
holub Tester
Oct 26, 2024, 18:53
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Nobody familiar with Cocoa here who can review MAME's current state and make any suggestions? |
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No.23149
holub Tester
Mar 19, 2025, 12:13
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found this thread: https://stackoverflow.com/questions/61456448/sdl-and-qt-resizing-the-app-causes-display-freeze-when-rendering-from-another-t Can anybody confirm that "Create all SDL stuff in that thread because SDL_Renderer needs to be created in a thread that handles SDL events. Use SDL_PushEvent to signal this thread to render to screen." can be solution for our problem or completely irrelative? |
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No.23150
holub Tester
Mar 20, 2025, 15:19
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Just received confirmation from a user: build with qt6 solves the issue |