perf: capture 1440p frame times; PASS the 60 FPS release check (#16)

Merged PR #16: 1440p perf capture (60 FPS check PASS)

Co-authored-by: Zwitschi <zwitschi82@gmail.com>

Game/GigLine/Source/GigLine/GigLineCharacter.cpp

@@ -14,6 +14,9 @@
 #include "Kismet/GameplayStatics.h"
 #include "Misc/CommandLine.h"
 #include "Misc/Parse.h"
+#include "Misc/FileHelper.h"
+#include "Misc/Paths.h"
+#include "HAL/FileManager.h"
 
 // Development-only diagnostics for the walkable demo. These describe the spawn
 // and input setup and are not needed in a shipped build's log spam; disable
@@ -192,6 +195,9 @@ void AGigLineCharacter::StartQASelfTest()
 		bool bResetReturned = false;
 		bool bPausedOn = false;
 		bool bUnpausedBack = false;
+		// Performance capture over the fixed walk route (1.0-3.0 s).
+		TArray<float> FrameMs;
+		bool bPerfLogged = false;
 	};
 
 	TSharedPtr<FQAState> State = MakeShared<FQAState>();
@@ -219,6 +225,8 @@ void AGigLineCharacter::StartQASelfTest()
 			if (bQATestWalking)
 			{
 				AddMovementInput(GetActorForwardVector(), 1.0f);
+				// Frame time for the perf capture (this ticker runs every frame).
+				State->FrameMs.Add(DeltaTime * 1000.0f);
 			}
 
 			// 3.0: stop and measure.
@@ -233,6 +241,57 @@ void AGigLineCharacter::StartQASelfTest()
 					TEXT("GigLine QA: walk moved %.0f cm in 2 s -> %s (Z %.0f -> %.0f)"),
 					Walked, State->bWalkMoved ? TEXT("PASS") : TEXT("FAIL"),
 					State->Start.Z, State->WalkEnd.Z);
+
+				// Perf: report frame-time stats over the fixed walk route.
+				if (!State->bPerfLogged && State->FrameMs.Num() > 10)
+				{
+					State->bPerfLogged = true;
+					TArray<float> Sorted = State->FrameMs;
+					Sorted.Sort();
+					const int32 N = Sorted.Num();
+					double Sum = 0.0;
+					for (float Ms : Sorted) { Sum += Ms; }
+					const float AvgMs = static_cast<float>(Sum / N);
+					const float P50 = Sorted[N / 2];
+					const float P95 = Sorted[FMath::Clamp((int32)(N * 0.95f), 0, N - 1)];
+					const float P99 = Sorted[FMath::Clamp((int32)(N * 0.99f), 0, N - 1)];
+					const float MaxMs = Sorted.Last();
+					FVector2D Res(0.0, 0.0);
+					if (GEngine && GEngine->GameViewport)
+					{
+						GEngine->GameViewport->GetViewportSize(Res);
+					}
+					// Record the upscaling/AA state so the check is reproducible.
+					auto CV = [](const TCHAR* Name)
+					{
+						IConsoleVariable* Var = IConsoleManager::Get().FindConsoleVariable(Name);
+						return Var ? Var->GetInt() : -999;
+					};
+					UE_LOG(LogTemp, Log,
+						TEXT("GigLine PERF: frames=%d avg=%.2fms (%.1f fps) p50=%.2f p95=%.2f p99=%.2f max=%.2f ms at %dx%d"),
+						N, AvgMs, AvgMs > 0.f ? 1000.f / AvgMs : 0.f, P50, P95, P99, MaxMs,
+						(int32)Res.X, (int32)Res.Y);
+					UE_LOG(LogTemp, Log,
+						TEXT("GigLine PERF: AntiAliasingMethod=%d ScreenPercentage=%d TSR=%d FrameGen=%d VSync=%d"),
+						CV(TEXT("r.AntiAliasingMethod")), CV(TEXT("r.ScreenPercentage")),
+						CV(TEXT("r.TSR.History.ScreenPercentage")),
+						CV(TEXT("r.Streamline.FrameGeneration.Mode")),
+						CV(TEXT("r.VSync")));
+
+					// Frame-time series, so the check has a graph source, not one sample.
+					{
+						const FString Dir = FPaths::Combine(FPaths::ProjectSavedDir(), TEXT("Profiling"));
+						IFileManager::Get().MakeDirectory(*Dir, true);
+						const FString Path = FPaths::Combine(Dir, TEXT("perf-walk-frametimes.csv"));
+						FString Csv(TEXT("frame,ms\n"));
+						for (int32 i = 0; i < N; ++i)
+						{
+							Csv += FString::Printf(TEXT("%d,%.3f\n"), i, State->FrameMs[i]);
+						}
+						FFileHelper::SaveStringToFile(Csv, *Path);
+						UE_LOG(LogTemp, Log, TEXT("GigLine PERF: frame times written to %s"), *Path);
+					}
+				}
 			}
 
 			// 3.5: reset should return to the spawn point.