draw optimizations

client/world/renderer_plan_bench_test.go

@@ -0,0 +1,53 @@
+package world
+
+import (
+	"image/color"
+	"testing"
+)
+
+func BenchmarkBuildRenderPlanStageA_Candidates(b *testing.B) {
+	w := NewWorld(600, 600)
+
+	// Make the index/grid available.
+	w.IndexOnViewportChange(1000, 700, 1.0)
+
+	// Populate with enough objects to create duplicates across cells.
+	// Circles and lines create bbox indexing (more duplicates).
+	for i := 0; i < 2000; i++ {
+		_, _ = w.AddPoint(float64(i%600), float64((i*7)%600))
+	}
+	for i := 0; i < 1200; i++ {
+		_, _ = w.AddCircle(float64((i*11)%600), float64((i*13)%600), 8.0)
+	}
+	for i := 0; i < 1200; i++ {
+		x1 := float64((i*3 + 10) % 600)
+		y1 := float64((i*5 + 20) % 600)
+		x2 := float64((i*7 + 400) % 600)
+		y2 := float64((i*11 + 300) % 600)
+		_, _ = w.AddLine(x1, y1, x2, y2)
+	}
+	w.Reindex()
+
+	params := RenderParams{
+		ViewportWidthPx:  1000,
+		ViewportHeightPx: 700,
+		MarginXPx:        250,
+		MarginYPx:        175,
+		CameraXWorldFp:   300 * SCALE,
+		CameraYWorldFp:   300 * SCALE,
+		CameraZoom:       1.0,
+		Options: &RenderOptions{
+			BackgroundColor: color.RGBA{A: 255},
+		},
+	}
+
+	b.ReportAllocs()
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		_, err := w.buildRenderPlanStageA(params)
+		if err != nil {
+			b.Fatalf("build plan: %v", err)
+		}
+	}
+}