Add observer type to Perf event

Summary: While looking at the event stream it is useful to know which observer type fired it

Reviewed By: lblasa

Differential Revision: D39430756

fbshipit-source-id: bc52f085a5497692f8076b12a9c015cc33a19d1e

android/src/main/java/com/facebook/flipper/plugins/uidebugger/core/NativeScanScheduler.kt

@@ -57,6 +57,7 @@ class NativeScanScheduler(val context: Context) : Scheduler.Task<ScanResult> {
             PerfStatsEvent.serializer(),
             PerfStatsEvent(
                 result.txId,
+                "FullScan",
                 result.scanStart,
                 result.scanEnd,
                 result.scanEnd,

android/src/main/java/com/facebook/flipper/plugins/uidebugger/model/Events.kt

@@ -32,6 +32,7 @@ data class NativeScanEvent(val txId: Long, val nodes: List<Node>) {
 @kotlinx.serialization.Serializable
 data class PerfStatsEvent(
     val txId: Long,
+    val observerType: String,
     val start: Long,
     val traversalComplete: Long,
     val queuingComplete: Long,

android/src/main/java/com/facebook/flipper/plugins/uidebugger/observers/TreeObserver.kt

@@ -53,7 +53,7 @@ class TreeObserverManager(val context: Context) {
       while (isActive) {
         try {
 
-          val observation = treeUpdates.receive()
+          val treeUpdate = treeUpdates.receive()
 
           val onWorkerThread = System.currentTimeMillis()
 
@@ -61,24 +61,24 @@ class TreeObserverManager(val context: Context) {
           val serialized =
               Json.encodeToString(
                   SubtreeUpdateEvent.serializer(),
-                  SubtreeUpdateEvent(txId, observation.observerType, observation.nodes))
+                  SubtreeUpdateEvent(txId, treeUpdate.observerType, treeUpdate.nodes))
 
           val serializationEnd = System.currentTimeMillis()
 
           context.connectionRef.connection?.send(SubtreeUpdateEvent.name, serialized)
           val socketEnd = System.currentTimeMillis()
-          Log.i(
-              LogTag, "Sent event for ${observation.observerType} nodes ${observation.nodes.size}")
+          Log.i(LogTag, "Sent event for ${treeUpdate.observerType} nodes ${treeUpdate.nodes.size}")
 
           val perfStats =
               PerfStatsEvent(
                   txId = txId,
-                  start = observation.startTime,
-                  traversalComplete = observation.traversalCompleteTime,
+                  observerType = treeUpdate.observerType,
+                  start = treeUpdate.startTime,
+                  traversalComplete = treeUpdate.traversalCompleteTime,
                   queuingComplete = onWorkerThread,
                   serializationComplete = serializationEnd,
                   socketComplete = socketEnd,
-                  nodesCount = observation.nodes.size)
+                  nodesCount = treeUpdate.nodes.size)
           context.connectionRef.connection?.send(
               PerfStatsEvent.name, Json.encodeToString(PerfStatsEvent.serializer(), perfStats))
         } catch (e: java.lang.Exception) {

desktop/plugins/public/ui-debugger/components/main.tsx

@@ -58,6 +58,10 @@ export const columns: DataTableColumn<PerfStatsEvent>[] = [
     key: 'txId',
     title: 'TXID',
   },
+  {
+    key: 'observerType',
+    title: 'Type',
+  },
   {
     key: 'nodesCount',
     title: 'Total nodes',

desktop/plugins/public/ui-debugger/index.tsx

@@ -12,6 +12,7 @@ import {Id, UINode} from './types';
 
 export type PerfStatsEvent = {
   txId: number;
+  observerType: string;
   start: number;
   traversalComplete: number;
   serializationComplete: number;