Significant performance differences between the ARM and x86 versions of RPCS3 for macOS

[DarthGigi]

Quick summary

Discovered while asking for support in the Discord server, suggested that I should make a report on GitHub.

Using Skylanders: Spyro's Adventure [BLES01272] as an example. The game only manages 5-10fps on the ARM version of RPCS3, while giving a steady 30fps on the x86 (aka Intel) version.

Details

The performance difference between the ARM and x86 version of RPCS3 is weird, as with the ARM version, macOS doesn't have to use Rosetta 2 to translate x86 instructions to ARM (aka one less translation layer).

Attach a log file

RPCS3 ARM.log.gz

RPCS3.x86.log.gz

Attach capture files for visual issues

x86 Gameplay
ARM Gameplay

System configuration

RPCS3 v0.0.36-17947-52aa4755 Alpha | HEAD
Apple M4 Pro (10P+4E) | 14 Threads | 48.00 GiB RAM | TSC: 0.024GHz | FMA3
Operating system: macOS, Version: 15.5.0
Vulkan-compatible GPU: 'Apple M4 Pro' running on driver 0.2.60
LLVM version: 19.1.7
Firmware version: 4.92

Other details

No response