Add heavy pipeline comparison tests

test_heavy_fused.sexp

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+;; Heavy Fused Pipeline Test
+;;
+;; Tests with many effects to show the full benefit of kernel fusion
+
+(stream "heavy_fused_test"
+  :fps 30
+  :width 1920
+  :height 1080
+  :seed 42
+
+  ;; Load primitives
+  (require-primitives "streaming_gpu")
+  (require-primitives "image")
+  (require-primitives "math")
+
+  ;; Define heavy effects pipeline (5 effects fused into one kernel)
+  (def heavy-pipeline
+    [{:op "rotate" :angle 0}
+     {:op "zoom" :amount 1.0}
+     {:op "hue_shift" :degrees 30}
+     {:op "ripple" :amplitude 15 :frequency 10 :decay 2 :phase 0 :center_x 960 :center_y 540}
+     {:op "brightness" :factor 1.0}])
+
+  ;; Frame pipeline
+  (frame
+    (let [;; Create base image
+          r (+ 0.5 (* 0.5 (math:sin (* t 1))))
+          g (+ 0.5 (* 0.5 (math:sin (* t 1.3))))
+          b (+ 0.5 (* 0.5 (math:sin (* t 1.7))))
+          color [(* r 255) (* g 255) (* b 255)]
+          base (image:make-image 1920 1080 color)
+
+          ;; Dynamic parameters
+          angle1 (* t 30)
+          angle2 (* t -20)
+          zoom1 (+ 1.0 (* 0.1 (math:sin (* t 0.5))))
+          zoom2 (+ 1.0 (* 0.05 (math:cos (* t 0.7))))
+          phase1 (* t 2)
+          phase2 (* t 3)]
+
+      ;; 10 effects in ONE kernel call!
+      (streaming_gpu:fused-pipeline base heavy-pipeline
+        :rotate_angle angle1
+        :zoom_amount zoom1
+        :ripple_phase phase1))))

test_heavy_interpreted.sexp

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+;; Heavy Interpreted Pipeline Test
+;;
+;; Same effects as test_heavy_fused.sexp but using separate primitive calls
+
+(stream "heavy_interpreted_test"
+  :fps 30
+  :width 1920
+  :height 1080
+  :seed 42
+
+  ;; Load primitives
+  (require-primitives "streaming_gpu")
+  (require-primitives "geometry_gpu")
+  (require-primitives "color_ops")
+  (require-primitives "image")
+  (require-primitives "math")
+
+  ;; Frame pipeline - INTERPRETED (separate calls)
+  (frame
+    (let [;; Create base image
+          r (+ 0.5 (* 0.5 (math:sin (* t 1))))
+          g (+ 0.5 (* 0.5 (math:sin (* t 1.3))))
+          b (+ 0.5 (* 0.5 (math:sin (* t 1.7))))
+          color [(* r 255) (* g 255) (* b 255)]
+          base (image:make-image 1920 1080 color)
+
+          ;; Dynamic parameters
+          angle (* t 30)
+          zoom (+ 1.0 (* 0.1 (math:sin (* t 0.5))))
+          phase (* t 2)
+
+          ;; Apply 5 effects one by one (INTERPRETED - many kernel launches)
+          step1 (geometry_gpu:rotate base angle)
+          step2 (streaming_gpu:gpu-zoom step1 zoom)
+          step3 (color_ops:hue-shift step2 30)
+          step4 (geometry_gpu:ripple step3 15 :frequency 10 :decay 2 :time phase)
+          step5 (color_ops:brightness step4 1.0)]
+
+      step5)))