[GPU] Changed default readback_resolve to none

src/xenia/base/cvar.h

@@ -511,7 +511,7 @@ class IConfigVarUpdate {
   // If you're reviewing a pull request with a change here, check if 1) has been
   // done by the submitter before merging.
   static constexpr uint32_t kLastCommittedUpdateDate =
-      MakeConfigVarUpdateDate(2025, 12, 1, 23);
+      MakeConfigVarUpdateDate(2025, 12, 4, 21);
 
   virtual ~IConfigVarUpdate() = default;
 

src/xenia/gpu/command_processor.cc

@@ -49,13 +49,16 @@ DEFINE_bool(clear_memory_page_state, false,
             "GPU");
 
 DEFINE_string(
-    readback_resolve, "fast",
+    readback_resolve, "none",
     "Controls CPU readback of render-to-texture resolve results.\n"
-    " fast: Read from previous frame (1 frame delay, no GPU stall - default)\n"
+    " fast: Read from previous frame (1 frame delay, no GPU stall, slight "
+    "performance hit)\n"
     " full: Wait for GPU to finish (accurate but slow, GPU-CPU sync stall)\n"
     " none: Disable readback completely (some games render better without it)",
     "GPU");
 
+UPDATE_from_string(readback_resolve, 2025, 12, 4, 21, "fast");
+
 DEFINE_bool(
     readback_memexport, false,
     "Read data written by memory export in shaders on the CPU. "