diff --git a/sexp_effects/primitive_libs/streaming_gpu.py b/sexp_effects/primitive_libs/streaming_gpu.py
index 2b37593..3e7b247 100644
--- a/sexp_effects/primitive_libs/streaming_gpu.py
+++ b/sexp_effects/primitive_libs/streaming_gpu.py
@@ -873,6 +873,8 @@ def _normalize_effect_dict(effect):
     return result
 
 
+_FUSED_CALL_COUNT = 0
+
 def prim_fused_pipeline(img, effects_list, **dynamic_params):
     """
     Apply a fused CUDA kernel pipeline to an image.
@@ -894,6 +896,11 @@ def prim_fused_pipeline(img, effects_list, **dynamic_params):
 
     Supported ops: rotate, zoom, ripple, invert, hue_shift, brightness
     """
+    global _FUSED_CALL_COUNT
+    _FUSED_CALL_COUNT += 1
+    if _FUSED_CALL_COUNT <= 5 or _FUSED_CALL_COUNT % 100 == 0:
+        print(f"[FUSED] call #{_FUSED_CALL_COUNT}, effects={len(effects_list)}, params={list(dynamic_params.keys())}", file=sys.stderr)
+
     # Normalize effects list - convert Keyword keys to strings
     effects_list = [_normalize_effect_dict(e) for e in effects_list]