[dotnet-watch] Remove excess logging that slows down Hot Reload (#51220)

Author: tmat

src/BuiltInTools/dotnet-watch/HotReload/CompilationHandler.cs

@@ -77,7 +77,23 @@ public async ValueTask StartSessionAsync(CancellationToken cancellationToken)
         {
             _logger.Log(MessageDescriptor.HotReloadSessionStarting);
 
-            await _hotReloadService.StartSessionAsync(Workspace.CurrentSolution, cancellationToken);
+            var solution = Workspace.CurrentSolution;
+
+            await _hotReloadService.StartSessionAsync(solution, cancellationToken);
+
+            // TODO: StartSessionAsync should do this: https://github.com/dotnet/roslyn/issues/80687
+            foreach (var project in solution.Projects)
+            {
+                foreach (var document in project.AdditionalDocuments)
+                {
+                    await document.GetTextAsync(cancellationToken);
+                }
+
+                foreach (var document in project.AnalyzerConfigDocuments)
+                {
+                    await document.GetTextAsync(cancellationToken);
+                }
+            }
 
             _logger.Log(MessageDescriptor.HotReloadSessionStarted);
         }

src/BuiltInTools/dotnet-watch/HotReload/IncrementalMSBuildWorkspace.cs

@@ -219,6 +219,7 @@ private static async ValueTask<SourceText> GetSourceTextAsync(string filePath, E
 
     public async Task ReportSolutionFilesAsync(Solution solution, CancellationToken cancellationToken)
     {
+#if DEBUG
         _logger.LogDebug("Solution: {Path}", solution.FilePath);
         foreach (var project in solution.Projects)
         {
@@ -245,5 +246,8 @@ async ValueTask InspectDocumentAsync(TextDocument document, string kind)
             var text = await document.GetTextAsync(cancellationToken);
             _logger.LogDebug("    {Kind}: {FilePath} [{Checksum}]", kind, document.FilePath, Convert.ToBase64String(text.GetChecksum().ToArray()));
         }
+#else
+        await Task.CompletedTask;
+#endif
     }
 }