08638: MacOS debugger extremely slow

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08638	Debugger	Minor	Have not tried	May 21, 2023, 00:10	Jan 11, 2024, 16:45

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
Steps To Reproduce	> mame spectrum -d * open new memory view for program space * resize window
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems

Attached Files	mame.sample.txt (2,607,384 bytes) May 30, 2023, 13:17 Uploaded by holub sample output

No.21454 holub Tester May 21, 2023, 12:59	It's not driver specific - same happens with amstrad
No.21516 Tafoid Administrator Jun 6, 2023, 16:38	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.
No.21541 holub Tester Jun 14, 2023, 16:29	similar in 0.253
No.21890 holub Tester Dec 21, 2023, 16:45	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 Senior Tester Jan 4, 2024, 18:44	So, is this a MAME issue? Or not? I don't have a Mac to check this.
No.21906 holub Tester Jan 11, 2024, 16:45	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.