perf(baseline): time full Draw() handler into LastDrawMs field

HellionChat/Plugin.cs

@@ -166,6 +166,15 @@ public sealed class Plugin : IAsyncDalamudPlugin
     // because the tick reads it from a different thread than the writer.
     private volatile bool _isDisposing;
 
+    // v1.9.0 B5: last full Draw() wall-time in ms, written once per frame at
+    // the end of the UiBuilder.Draw handler. Covers the GlobalStyleScope push
+    // and the font push (§7.5 First-Frame-HITCH must include atlas/style
+    // prologue cost), not just WindowSystem.Draw — measuring the inner call
+    // alone would drop the prologue and make the figure non-comparable to the
+    // v1.5.6 baseline. Only accumulated here; the disk write happens in
+    // PerformanceBaselineStep so the hot path stays allocation-free.
+    internal double LastDrawMs;
+
     internal int DeferredSaveFrames = -1;
 
     // Cancels the v1.4.8 FTS5 bulk-insert worker on plugin teardown. The
@@ -1012,48 +1021,65 @@ public sealed class Plugin : IAsyncDalamudPlugin
 
     private void Draw()
     {
-        // v1.4.8 B2: pick up external edits of the active custom theme JSON
+        // v1.9.0 B5: time the whole handler (style + font prologue included).
-        // without forcing the user to re-click the picker. The disk-stat is
+        // Bail before measuring once teardown has begun — a late Draw tick
-        // 1Hz-throttled inside RefreshActiveIfStale, so this is essentially
+        // must not touch ThemeRegistry / FontManager after DisposeAsync.
-        // free on built-in themes and ~1 stat/second on custom themes.
+        if (_isDisposing)
-        ThemeRegistry.RefreshActiveIfStale();
-
-        using IDisposable _style = Ui.StyleEngine.GlobalStyleScope.Push(
-            ThemeRegistry.Active,
-            ThemeRegistry,
-            Config.WindowOpacity
-        );
-
-        if (Config.HideInLoadingScreens && Condition[ConditionFlag.BetweenAreas])
-        {
-            TypingIpc.Update();
             return;
-        }
 
-        // Hide all plugin windows while the New Game+ menu is open.
+        var drawWatch = Stopwatch.StartNew();
-        if (
+        try
-            Config.HideInNewGamePlusMenu
+        {
-            && GameFunctions.GameFunctions.IsAddonInteractable(
+            // v1.4.8 B2: pick up external edits of the active custom theme JSON
-                GameFunctions.GameFunctions.NewGamePlusAddonName
+            // without forcing the user to re-click the picker. The disk-stat is
+            // 1Hz-throttled inside RefreshActiveIfStale, so this is essentially
+            // free on built-in themes and ~1 stat/second on custom themes.
+            ThemeRegistry.RefreshActiveIfStale();
+
+            using IDisposable _style = Ui.StyleEngine.GlobalStyleScope.Push(
+                ThemeRegistry.Active,
+                ThemeRegistry,
+                Config.WindowOpacity
+            );
+
+            if (Config.HideInLoadingScreens && Condition[ConditionFlag.BetweenAreas])
+            {
+                TypingIpc.Update();
+                return;
+            }
+
+            // Hide all plugin windows while the New Game+ menu is open.
+            if (
+                Config.HideInNewGamePlusMenu
+                && GameFunctions.GameFunctions.IsAddonInteractable(
+                    GameFunctions.GameFunctions.NewGamePlusAddonName
+                )
             )
-        )
+            {
-        {
+                TypingIpc.Update();
+                return;
+            }
+
+            Interface.UiBuilder.DisableUserUiHide = !Config.HideWhenUiHidden;
+
+            // RegularFont is nullable only because the live rebuild path
+            // disposes it before reassigning; both ends of that swap happen on
+            // this same draw thread, so it cannot be null here.
+            var useRegularFont = Config.FontsEnabled || Config.UseHellionFont;
+            using ((useRegularFont ? FontManager.RegularFont! : FontManager.Axis).Push())
+                WindowSystem.Draw();
+
             TypingIpc.Update();
-            return;
+
+            FileDialogManager.Draw();
+        }
+        finally
+        {
+            // finally so the early-return frames (loading screen / NG+) record
+            // their (cheap) time too instead of freezing on the last full frame.
+            drawWatch.Stop();
+            LastDrawMs = drawWatch.Elapsed.TotalMilliseconds;
         }
-
-        Interface.UiBuilder.DisableUserUiHide = !Config.HideWhenUiHidden;
-
-        // RegularFont is nullable only because the live rebuild path
-        // disposes it before reassigning; both ends of that swap happen on
-        // this same draw thread, so it cannot be null here.
-        var useRegularFont = Config.FontsEnabled || Config.UseHellionFont;
-        using ((useRegularFont ? FontManager.RegularFont! : FontManager.Axis).Push())
-            WindowSystem.Draw();
-
-        TypingIpc.Update();
-
-        FileDialogManager.Draw();
     }
 
     internal void SaveConfig()