fsleyes_parseargs.generateSceneArgs allows arguments to be excluded -

used by CanvasPanel genCommandLineArgs action to prevent performance
setting from being output.

fsl/fsleyes/fsleyes_parseargs.py

@@ -880,11 +880,14 @@ def applySceneArgs(args, overlayList, displayCtx, sceneOpts):
     _applyArgs(args, sceneOpts)
 
 
-def generateSceneArgs(overlayList, displayCtx, sceneOpts):
+def generateSceneArgs(overlayList, displayCtx, sceneOpts, exclude=None):
     """Generates command line arguments which describe the current state of
     the provided ``displayCtx`` and ``sceneOpts`` instances.
     """
 
+    if exclude is None:
+        exclude = []
+
     args = []
 
     args += ['--{}'.format(ARGUMENTS['Main.scene'][1])]
@@ -903,6 +906,8 @@ def generateSceneArgs(overlayList, displayCtx, sceneOpts):
         args += ['{}'.format(displayCtx.selectedOverlay)]
 
     props = OPTIONS.get(sceneOpts, allhits=True)
+
+    props = [p for p in props if p not in exclude]
     args += _generateArgs(sceneOpts, concat(props))
 
     return args

fsl/fsleyes/views/canvaspanel.py

@@ -316,7 +316,10 @@ def _genCommandLineArgs(overlayList, displayCtx, canvas):
     # Add scene options
     sceneOpts = canvas.getSceneOptions()
     argv += fsleyes_parseargs.generateSceneArgs(
-        overlayList, displayCtx, sceneOpts)
+        overlayList,
+        displayCtx,
+        sceneOpts,
+        exclude=['performance'])
 
     # Add ortho specific options, if it's 
     # an orthopanel we're dealing with