Valve enables FEX code cache in Proton Experimental for Arm

Valve developer Pierre-Loup Griffais said the FEX code cache is now enabled in the Arm build of Proton Experimental. He claims it should improve 1%-low frame times, especially over subsequent runs. The change targets the Steam Frame's Snapdragon 8 Gen 3, with no figures provided.

• FEX code cache enabled in the Arm build of Proton Experimental
• Valve promises better 1% lows, especially on repeat runs
• FEX translates x86 game code to Arm64 via a JIT compiler
• The change is opt-in and not part of numbered Proton releases