Lower syncing delay from VS to OOP

src/VisualStudio/Core/Def/Implementation/DesignerAttribute/VisualStudioDesignerAttributeService.cs

@@ -108,7 +108,7 @@ private async Task StartAsync(CancellationToken cancellationToken)
         private async Task StartWorkerAsync(CancellationToken cancellationToken)
         {
             _workQueue = new AsyncBatchingWorkQueue<DesignerAttributeData>(
-                TimeSpan.FromMilliseconds(500),
+                TimeSpan.FromMilliseconds(250),
                 this.NotifyProjectSystemAsync,
                 cancellationToken);
 

src/VisualStudio/Core/Def/Implementation/Remote/RemoteHostOptions.cs

@@ -17,19 +17,17 @@ namespace Microsoft.VisualStudio.LanguageServices.Remote
 {
     internal static class RemoteHostOptions
     {
-        // Update primary workspace on OOP every 4 seconds if VS is not running any global operation 
-        // such as build, solution open/close, rename and etc.
-        // Even if primary workspace is not updated, OOP will work as expected. updating primary workspace 
-        // on OOP should let latest data to be synched pre-emptively rather than on demand.
+        // Update primary workspace on OOP twice a second if VS is not running any global operation (such as build,
+        // solution open/close, rename, etc.)
         //
-        // 2 second is our usual long running interactive operation delay and 
-        // 5 second is usual ambient long running operation delay. 
-        // I chose one in between. among 3 and 4 seconds, I chose slower one - 4 second. 
+        // Even if primary workspace is not updated, other OOP queries will work as expected. Updating primary workspace
+        // on OOP should let latest data to be synced pre-emptively rather than on demand, and will kick off
+        // incremental analyzer tasks.
         //
-        // When primary workspace is staled, missing data will be synced to OOP on
-        // demand and cached for 3 min. enough for primary workspace in OOP to be synced to latest.
+        // When primary workspace is staled, missing data will be synced to OOP on demand and cached for 3 min. enough
+        // for primary workspace in OOP to be synced to latest.
         public static readonly Option<int> SolutionChecksumMonitorBackOffTimeSpanInMS = new Option<int>(
-            nameof(InternalFeatureOnOffOptions), nameof(SolutionChecksumMonitorBackOffTimeSpanInMS), defaultValue: 4000,
+            nameof(InternalFeatureOnOffOptions), nameof(SolutionChecksumMonitorBackOffTimeSpanInMS), defaultValue: 500,
             storageLocations: new LocalUserProfileStorageLocation(InternalFeatureOnOffOptions.LocalRegistryPath + nameof(SolutionChecksumMonitorBackOffTimeSpanInMS)));
 
         // use 64bit OOP