memoise a few more shared renderers

render/container.go

@@ -24,7 +24,7 @@ var UncontainedIDPrefix = MakePseudoNodeID(UncontainedID)
 // NB We only want processes in container _or_ processes with network connections
 // but we need to be careful to ensure we only include each edge once, by only
 // including the ProcessRenderer once.
-var ContainerRenderer = MakeFilter(
+var ContainerRenderer = Memoise(MakeFilter(
 	func(n report.Node) bool {
 		// Drop deleted containers
 		state, ok := n.Latest.Lookup(docker.ContainerState)
@@ -37,9 +37,9 @@ var ContainerRenderer = MakeFilter(
 		),
 		ConnectionJoin(MapContainer2IP, SelectContainer),
 	),
-)
+))
 
-var mapEndpoint2IP = MakeMap(endpoint2IP, SelectEndpoint)
+var mapEndpoint2IP = Memoise(MakeMap(endpoint2IP, SelectEndpoint))
 
 const originalNodeID = "original_node_id"
 

render/process.go

@@ -26,7 +26,7 @@ var EndpointRenderer = SelectEndpoint
 
 // ProcessRenderer is a Renderer which produces a renderable process
 // graph by merging the endpoint graph and the process topology.
-var ProcessRenderer = ConditionalRenderer(renderProcesses,
+var ProcessRenderer = Memoise(ConditionalRenderer(renderProcesses,
 	MakeReduce(
 		MakeMap(
 			MapEndpoint2Process,
@@ -34,13 +34,13 @@ var ProcessRenderer = ConditionalRenderer(renderProcesses,
 		),
 		SelectProcess,
 	),
-)
+))
 
 // ColorConnectedProcessRenderer colors connected nodes from
 // ProcessRenderer. Since the process topology views only show
 // connected processes, we need this info to determine whether
 // processes appearing in a details panel are linkable.
-var ColorConnectedProcessRenderer = ColorConnected(ProcessRenderer)
+var ColorConnectedProcessRenderer = Memoise(ColorConnected(ProcessRenderer))
 
 // processWithContainerNameRenderer is a Renderer which produces a process
 // graph enriched with container names where appropriate