diff --git a/light9/effect/sequencer/eval_faders.py b/light9/effect/sequencer/eval_faders.py
--- a/light9/effect/sequencer/eval_faders.py
+++ b/light9/effect/sequencer/eval_faders.py
@@ -1,3 +1,4 @@
+import traceback
 import logging
 import time
 from dataclasses import dataclass
@@ -18,7 +19,7 @@ from light9.typedgraph import typedValue
 log = logging.getLogger('seq.fader')
 
 COMPILE = Summary('compile_graph_fader', '')
-
+COMPUTE_ALL_FADERS = Summary('compute_all_faders', '')
 
 @dataclass
 class Fader:
@@ -72,6 +73,7 @@ class FaderEval:
         setAttr = typedValue(EffectAttr, self.graph, setting, L9['effectAttr'])
         return (Fader(self.graph, self.lib, cast(URIRef, fader), effect, setAttr))
 
+    @COMPUTE_ALL_FADERS.time()
     def computeOutput(self) -> DeviceSettings:
         faderEffectOutputs: List[DeviceSettings] = []
         now = UnixTime(time.time())
@@ -89,3 +91,7 @@ class FaderEval:
                 raise
 
         return DeviceSettings.merge(self.graph, faderEffectOutputs)
+        merged = DeviceSettings.merge(self.graph, faderEffectOutputs)
+        # please remove (after fixing stats display to show it)
+        log.debug("computed %s faders in %.1fms", len(self.faders), (time.time()-now)*1000)
+        return merged