add scoped timer

src/DotRecast.Core/RcAnonymousDisposable.cs

@@ -0,0 +1,20 @@
+using System;
+
+namespace DotRecast.Core
+{
+    public struct RcAnonymousDisposable : IDisposable
+    {
+        private Action _dispose;
+
+        public RcAnonymousDisposable(Action dispose)
+        {
+            _dispose = dispose;
+        }
+
+        public void Dispose()
+        {
+            _dispose?.Invoke();
+            _dispose = null;
+        }
+    }
+}

src/DotRecast.Core/RcTelemetry.cs

@@ -35,16 +35,23 @@ namespace DotRecast.Core
             _timerAccum = new ConcurrentDictionary<string, RcAtomicLong>();
         }
 
-        public void StartTimer(string name)
+        public IDisposable ScopedTimer(RcTimerLabel label)
         {
-            _timerStart.Value[name] = new RcAtomicLong(RcFrequency.Ticks);
+            StartTimer(label);
+            return new RcAnonymousDisposable(() => StopTimer(label));
         }
         
-        public void StopTimer(string name)
+        public void StartTimer(RcTimerLabel label)
+        {
+            _timerStart.Value[label.Name] = new RcAtomicLong(RcFrequency.Ticks);
+        }
+
+
+        public void StopTimer(RcTimerLabel label)
         {
             _timerAccum
-                .GetOrAdd(name, _ => new RcAtomicLong(0))
+                .GetOrAdd(label.Name, _ => new RcAtomicLong(0))
-                .AddAndGet(RcFrequency.Ticks - _timerStart.Value?[name].Read() ?? 0);
+                .AddAndGet(RcFrequency.Ticks - _timerStart.Value?[label.Name].Read() ?? 0);
         }
 
         public void Warn(string message)

src/DotRecast.Core/RcTimerLabel.cs

@@ -0,0 +1,109 @@
+namespace DotRecast.Core
+{
+    /// Recast performance timer categories.
+    /// @see rcContext
+    public class RcTimerLabel
+    {
+        /// The user defined total time of the build.
+        public static readonly RcTimerLabel RC_TIMER_TOTAL = new RcTimerLabel(nameof(RC_TIMER_TOTAL));
+
+        /// A user defined build time.
+        public static readonly RcTimerLabel RC_TIMER_TEMP = new RcTimerLabel(nameof(RC_TIMER_TEMP));
+
+        /// The time to rasterize the triangles. (See: #rcRasterizeTriangle)
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_TRIANGLES = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_TRIANGLES));
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_SPHERE = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_SPHERE));
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_CAPSULE = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_CAPSULE));
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_CYLINDER = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_CYLINDER));
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_BOX = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_BOX));
+        public static readonly RcTimerLabel RC_TIMER_RASTERIZE_CONVEX = new RcTimerLabel(nameof(RC_TIMER_RASTERIZE_CONVEX));
+
+        /// The time to build the compact heightfield. (See: #rcBuildCompactHeightfield)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_COMPACTHEIGHTFIELD = new RcTimerLabel(nameof(RC_TIMER_BUILD_COMPACTHEIGHTFIELD));
+
+        /// The total time to build the contours. (See: #rcBuildContours)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_CONTOURS = new RcTimerLabel(nameof(RC_TIMER_BUILD_CONTOURS));
+
+        /// The time to trace the boundaries of the contours. (See: #rcBuildContours)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_CONTOURS_TRACE = new RcTimerLabel(nameof(RC_TIMER_BUILD_CONTOURS_TRACE));
+
+        public static readonly RcTimerLabel RC_TIMER_BUILD_CONTOURS_WALK = new RcTimerLabel(nameof(RC_TIMER_BUILD_CONTOURS_WALK));
+        
+        /// The time to simplify the contours. (See: #rcBuildContours)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_CONTOURS_SIMPLIFY = new RcTimerLabel(nameof(RC_TIMER_BUILD_CONTOURS_SIMPLIFY));
+
+        /// The time to filter ledge spans. (See: #rcFilterLedgeSpans)
+        public static readonly RcTimerLabel RC_TIMER_FILTER_BORDER = new RcTimerLabel(nameof(RC_TIMER_FILTER_BORDER));
+
+        /// The time to filter low height spans. (See: #rcFilterWalkableLowHeightSpans)
+        public static readonly RcTimerLabel RC_TIMER_FILTER_WALKABLE = new RcTimerLabel(nameof(RC_TIMER_FILTER_WALKABLE));
+
+        /// The time to apply the median filter. (See: #rcMedianFilterWalkableArea)
+        public static readonly RcTimerLabel RC_TIMER_MEDIAN_AREA = new RcTimerLabel(nameof(RC_TIMER_MEDIAN_AREA));
+
+        /// The time to filter low obstacles. (See: #rcFilterLowHangingWalkableObstacles)
+        public static readonly RcTimerLabel RC_TIMER_FILTER_LOW_OBSTACLES = new RcTimerLabel(nameof(RC_TIMER_FILTER_LOW_OBSTACLES));
+
+        /// The time to build the polygon mesh. (See: #rcBuildPolyMesh)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_POLYMESH = new RcTimerLabel(nameof(RC_TIMER_BUILD_POLYMESH));
+
+        /// The time to merge polygon meshes. (See: #rcMergePolyMeshes)
+        public static readonly RcTimerLabel RC_TIMER_MERGE_POLYMESH = new RcTimerLabel(nameof(RC_TIMER_MERGE_POLYMESH));
+
+        /// The time to erode the walkable area. (See: #rcErodeWalkableArea)
+        public static readonly RcTimerLabel RC_TIMER_ERODE_AREA = new RcTimerLabel(nameof(RC_TIMER_ERODE_AREA));
+
+        /// The time to mark a box area. (See: #rcMarkBoxArea)
+        public static readonly RcTimerLabel RC_TIMER_MARK_BOX_AREA = new RcTimerLabel(nameof(RC_TIMER_MARK_BOX_AREA));
+
+        /// The time to mark a cylinder area. (See: #rcMarkCylinderArea)
+        public static readonly RcTimerLabel RC_TIMER_MARK_CYLINDER_AREA = new RcTimerLabel(nameof(RC_TIMER_MARK_CYLINDER_AREA));
+
+        /// The time to mark a convex polygon area. (See: #rcMarkConvexPolyArea)
+        public static readonly RcTimerLabel RC_TIMER_MARK_CONVEXPOLY_AREA = new RcTimerLabel(nameof(RC_TIMER_MARK_CONVEXPOLY_AREA));
+
+        /// The total time to build the distance field. (See: #rcBuildDistanceField)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_DISTANCEFIELD = new RcTimerLabel(nameof(RC_TIMER_BUILD_DISTANCEFIELD));
+
+        /// The time to build the distances of the distance field. (See: #rcBuildDistanceField)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_DISTANCEFIELD_DIST = new RcTimerLabel(nameof(RC_TIMER_BUILD_DISTANCEFIELD_DIST));
+
+        /// The time to blur the distance field. (See: #rcBuildDistanceField)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_DISTANCEFIELD_BLUR = new RcTimerLabel(nameof(RC_TIMER_BUILD_DISTANCEFIELD_BLUR));
+
+        /// The total time to build the regions. (See: #rcBuildRegions, #rcBuildRegionsMonotone)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_REGIONS = new RcTimerLabel(nameof(RC_TIMER_BUILD_REGIONS));
+
+        /// The total time to apply the watershed algorithm. (See: #rcBuildRegions)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_REGIONS_WATERSHED = new RcTimerLabel(nameof(RC_TIMER_BUILD_REGIONS_WATERSHED));
+
+        /// The time to expand regions while applying the watershed algorithm. (See: #rcBuildRegions)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_REGIONS_EXPAND = new RcTimerLabel(nameof(RC_TIMER_BUILD_REGIONS_EXPAND));
+
+        /// The time to flood regions while applying the watershed algorithm. (See: #rcBuildRegions)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_REGIONS_FLOOD = new RcTimerLabel(nameof(RC_TIMER_BUILD_REGIONS_FLOOD));
+
+        /// The time to filter out small regions. (See: #rcBuildRegions, #rcBuildRegionsMonotone)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_REGIONS_FILTER = new RcTimerLabel(nameof(RC_TIMER_BUILD_REGIONS_FILTER));
+
+        /// The time to build heightfield layers. (See: #rcBuildHeightfieldLayers)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_LAYERS = new RcTimerLabel(nameof(RC_TIMER_BUILD_LAYERS));
+
+        /// The time to build the polygon mesh detail. (See: #rcBuildPolyMeshDetail)
+        public static readonly RcTimerLabel RC_TIMER_BUILD_POLYMESHDETAIL = new RcTimerLabel(nameof(RC_TIMER_BUILD_POLYMESHDETAIL));
+
+        /// The time to merge polygon mesh details. (See: #rcMergePolyMeshDetails)
+        public static readonly RcTimerLabel RC_TIMER_MERGE_POLYMESHDETAIL = new RcTimerLabel(nameof(RC_TIMER_MERGE_POLYMESHDETAIL));
+
+
+        /// The maximum number of timers.  (Used for iterating timers.)
+        public static readonly RcTimerLabel RC_MAX_TIMERS = new RcTimerLabel(nameof(RC_MAX_TIMERS));
+
+        public readonly string Name;
+
+        private RcTimerLabel(string name)
+        {
+            Name = name;
+        }
+    };
+}

src/DotRecast.Recast/RecastArea.cs

@@ -39,7 +39,7 @@ namespace DotRecast.Recast
         {
             int w = chf.width;
             int h = chf.height;
-            ctx.StartTimer("ERODE_AREA");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_ERODE_AREA);
 
             int[] dist = new int[chf.spanCount];
             Array.Fill(dist, 255);
@@ -205,8 +205,6 @@ namespace DotRecast.Recast
             for (int i = 0; i < chf.spanCount; ++i)
                 if (dist[i] < thr)
                     chf.areas[i] = RC_NULL_AREA;
-
-            ctx.StopTimer("ERODE_AREA");
         }
 
         /// @par
@@ -220,7 +218,7 @@ namespace DotRecast.Recast
             int w = chf.width;
             int h = chf.height;
 
-            ctx.StartTimer("MEDIAN_AREA");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MEDIAN_AREA);
 
             int[] areas = new int[chf.spanCount];
 
@@ -273,8 +271,6 @@ namespace DotRecast.Recast
 
             chf.areas = areas;
 
-            ctx.StopTimer("MEDIAN_AREA");
-
             return true;
         }
 
@@ -285,7 +281,7 @@ namespace DotRecast.Recast
         /// @see rcCompactHeightfield, rcMedianFilterWalkableArea
         public static void MarkBoxArea(RcTelemetry ctx, float[] bmin, float[] bmax, AreaModification areaMod, RcCompactHeightfield chf)
         {
-            ctx.StartTimer("MARK_BOX_AREA");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MARK_BOX_AREA);
 
             int minx = (int)((bmin[0] - chf.bmin.x) / chf.cs);
             int miny = (int)((bmin[1] - chf.bmin.y) / chf.ch);
@@ -328,8 +324,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("MARK_BOX_AREA");
         }
 
         static bool PointInPoly(float[] verts, RcVec3f p)
@@ -360,7 +354,7 @@ namespace DotRecast.Recast
         public static void MarkConvexPolyArea(RcTelemetry ctx, float[] verts, float hmin, float hmax, AreaModification areaMod,
             RcCompactHeightfield chf)
         {
-            ctx.StartTimer("MARK_CONVEXPOLY_AREA");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MARK_CONVEXPOLY_AREA);
 
             RcVec3f bmin = new RcVec3f();
             RcVec3f bmax = new RcVec3f();
@@ -426,8 +420,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("MARK_CONVEXPOLY_AREA");
         }
 
         /// @par
@@ -437,7 +429,7 @@ namespace DotRecast.Recast
         /// @see rcCompactHeightfield, rcMedianFilterWalkableArea
         public static void MarkCylinderArea(RcTelemetry ctx, float[] pos, float r, float h, AreaModification areaMod, RcCompactHeightfield chf)
         {
-            ctx.StartTimer("MARK_CYLINDER_AREA");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MARK_CYLINDER_AREA);
 
             RcVec3f bmin = new RcVec3f();
             RcVec3f bmax = new RcVec3f();
@@ -501,8 +493,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("MARK_CYLINDER_AREA");
         }
     }
 }

src/DotRecast.Recast/RecastCompact.cs

@@ -41,7 +41,7 @@ namespace DotRecast.Recast
         public static RcCompactHeightfield BuildCompactHeightfield(RcTelemetry ctx, int walkableHeight, int walkableClimb,
             RcHeightfield hf)
         {
-            ctx.StartTimer("BUILD_COMPACTHEIGHTFIELD");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_COMPACTHEIGHTFIELD);
 
             RcCompactHeightfield chf = new RcCompactHeightfield();
             int w = hf.width;
@@ -161,7 +161,6 @@ namespace DotRecast.Recast
                                                                                                   + " (max: " + MAX_LAYERS + ")");
             }
 
-            ctx.StopTimer("BUILD_COMPACTHEIGHTFIELD");
             return chf;
         }
 

src/DotRecast.Recast/RecastContour.cs

@@ -722,7 +722,8 @@ namespace DotRecast.Recast
             int borderSize = chf.borderSize;
             RcContourSet cset = new RcContourSet();
 
-            ctx.StartTimer("CONTOURS");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS);
+            
             cset.bmin = chf.bmin;
             cset.bmax = chf.bmax;
             if (borderSize > 0)
@@ -744,7 +745,7 @@ namespace DotRecast.Recast
 
             int[] flags = new int[chf.spanCount];
 
-            ctx.StartTimer("CONTOURS_TRACE");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_TRACE);
 
             // Mark boundaries.
             for (int y = 0; y < h; ++y)
@@ -782,7 +783,7 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StopTimer("CONTOURS_TRACE");
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_TRACE);
 
             List<int> verts = new List<int>(256);
             List<int> simplified = new List<int>(64);
@@ -808,14 +809,14 @@ namespace DotRecast.Recast
                         verts.Clear();
                         simplified.Clear();
 
-                        ctx.StartTimer("CONTOURS_WALK");
+                        ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_WALK);
                         WalkContour(x, y, i, chf, flags, verts);
-                        ctx.StopTimer("CONTOURS_WALK");
+                        ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_WALK);
 
-                        ctx.StartTimer("CONTOURS_SIMPLIFY");
+                        ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_SIMPLIFY);
                         SimplifyContour(verts, simplified, maxError, maxEdgeLen, buildFlags);
                         RemoveDegenerateSegments(simplified);
-                        ctx.StopTimer("CONTOURS_SIMPLIFY");
+                        ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_CONTOURS_SIMPLIFY);
 
                         // Store region->contour remap info.
                         // Create contour.
@@ -956,7 +957,6 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StopTimer("CONTOURS");
             return cset;
         }
     }

src/DotRecast.Recast/RecastFilledVolumeRasterization.cs

@@ -31,7 +31,7 @@ namespace DotRecast.Recast
 
         public static void RasterizeSphere(RcHeightfield hf, RcVec3f center, float radius, int area, int flagMergeThr, RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_SPHERE");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_SPHERE);
             float[] bounds =
             {
                 center.x - radius, center.y - radius, center.z - radius, center.x + radius, center.y + radius,
@@ -39,13 +39,12 @@ namespace DotRecast.Recast
             };
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectSphere(rectangle, center, radius * radius));
-            ctx.StopTimer("RASTERIZE_SPHERE");
         }
 
         public static void RasterizeCapsule(RcHeightfield hf, RcVec3f start, RcVec3f end, float radius, int area, int flagMergeThr,
             RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_CAPSULE");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CAPSULE);
             float[] bounds =
             {
                 Math.Min(start.x, end.x) - radius, Math.Min(start.y, end.y) - radius,
@@ -55,13 +54,12 @@ namespace DotRecast.Recast
             RcVec3f axis = RcVec3f.Of(end.x - start.x, end.y - start.y, end.z - start.z);
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectCapsule(rectangle, start, end, axis, radius * radius));
-            ctx.StopTimer("RASTERIZE_CAPSULE");
         }
 
         public static void RasterizeCylinder(RcHeightfield hf, RcVec3f start, RcVec3f end, float radius, int area, int flagMergeThr,
             RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_CYLINDER");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CYLINDER);
             float[] bounds =
             {
                 Math.Min(start.x, end.x) - radius, Math.Min(start.y, end.y) - radius,
@@ -71,13 +69,12 @@ namespace DotRecast.Recast
             RcVec3f axis = RcVec3f.Of(end.x - start.x, end.y - start.y, end.z - start.z);
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectCylinder(rectangle, start, end, axis, radius * radius));
-            ctx.StopTimer("RASTERIZE_CYLINDER");
         }
 
         public static void RasterizeBox(RcHeightfield hf, RcVec3f center, RcVec3f[] halfEdges, int area, int flagMergeThr,
             RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_BOX");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_BOX);
             RcVec3f[] normals =
             {
                 RcVec3f.Of(halfEdges[0].x, halfEdges[0].y, halfEdges[0].z),
@@ -123,13 +120,12 @@ namespace DotRecast.Recast
             }
 
             RasterizationFilledShape(hf, bounds, area, flagMergeThr, rectangle => IntersectBox(rectangle, vertices, planes));
-            ctx.StopTimer("RASTERIZE_BOX");
         }
 
         public static void RasterizeConvex(RcHeightfield hf, float[] vertices, int[] triangles, int area, int flagMergeThr,
             RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_CONVEX");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_CONVEX);
             float[] bounds = new float[] { vertices[0], vertices[1], vertices[2], vertices[0], vertices[1], vertices[2] };
             for (int i = 0; i < vertices.Length; i += 3)
             {
@@ -179,7 +175,6 @@ namespace DotRecast.Recast
 
             RasterizationFilledShape(hf, bounds, area, flagMergeThr,
                 rectangle => IntersectConvex(rectangle, triangles, vertices, planes, triBounds));
-            ctx.StopTimer("RASTERIZE_CONVEX");
         }
 
         private static void Plane(float[][] planes, int p, float[] v1, float[] v2, float[] vertices, int vert)

src/DotRecast.Recast/RecastFilter.cs

@@ -40,7 +40,7 @@ namespace DotRecast.Recast
         /// @see rcHeightfield, rcConfig
         public static void FilterLowHangingWalkableObstacles(RcTelemetry ctx, int walkableClimb, RcHeightfield solid)
         {
-            ctx.StartTimer("FILTER_LOW_OBSTACLES");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_LOW_OBSTACLES);
 
             int w = solid.width;
             int h = solid.height;
@@ -71,8 +71,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("FILTER_LOW_OBSTACLES");
         }
 
         /// @par
@@ -87,7 +85,7 @@ namespace DotRecast.Recast
         /// @see rcHeightfield, rcConfig
         public static void FilterLedgeSpans(RcTelemetry ctx, int walkableHeight, int walkableClimb, RcHeightfield solid)
         {
-            ctx.StartTimer("FILTER_LEDGE");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_BORDER);
 
             int w = solid.width;
             int h = solid.height;
@@ -168,8 +166,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("FILTER_LEDGE");
         }
 
         /// @par
@@ -180,7 +176,7 @@ namespace DotRecast.Recast
         /// @see rcHeightfield, rcConfig
         public static void FilterWalkableLowHeightSpans(RcTelemetry ctx, int walkableHeight, RcHeightfield solid)
         {
-            ctx.StartTimer("FILTER_WALKABLE");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_FILTER_WALKABLE);
 
             int w = solid.width;
             int h = solid.height;
@@ -200,8 +196,6 @@ namespace DotRecast.Recast
                     }
                 }
             }
-
-            ctx.StopTimer("FILTER_WALKABLE");
         }
     }
 }

src/DotRecast.Recast/RecastLayers.cs

@@ -53,7 +53,8 @@ namespace DotRecast.Recast
 
         public static RcHeightfieldLayerSet BuildHeightfieldLayers(RcTelemetry ctx, RcCompactHeightfield chf, int walkableHeight)
         {
-            ctx.StartTimer("RC_TIMER_BUILD_LAYERS");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_LAYERS);
+            
             int w = chf.width;
             int h = chf.height;
             int borderSize = chf.borderSize;
@@ -397,7 +398,7 @@ namespace DotRecast.Recast
             // No layers, return empty.
             if (layerId == 0)
             {
-                // ctx.StopTimer(RC_TIMER_BUILD_LAYERS);
+                // ctx.Stop(RC_TIMER_BUILD_LAYERS);
                 return null;
             }
 

src/DotRecast.Recast/RecastMesh.cs

@@ -966,7 +966,8 @@ namespace DotRecast.Recast
         /// @see rcAllocPolyMesh, rcContourSet, rcPolyMesh, rcConfig
         public static RcPolyMesh BuildPolyMesh(RcTelemetry ctx, RcContourSet cset, int nvp)
         {
-            ctx.StartTimer("POLYMESH");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_POLYMESH);
+
             RcPolyMesh mesh = new RcPolyMesh();
             mesh.bmin = cset.bmin;
             mesh.bmax = cset.bmax;
@@ -1204,7 +1205,6 @@ namespace DotRecast.Recast
                                                                                                  + " (max " + MAX_MESH_VERTS_POLY + "). Data can be corrupted.");
             }
 
-            ctx.StopTimer("POLYMESH");
             return mesh;
         }
 
@@ -1214,7 +1214,8 @@ namespace DotRecast.Recast
             if (nmeshes == 0 || meshes == null)
                 return null;
 
-            ctx.StartTimer("MERGE_POLYMESH");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MERGE_POLYMESH);
+
             RcPolyMesh mesh = new RcPolyMesh();
             mesh.nvp = meshes[0].nvp;
             mesh.cs = meshes[0].cs;
@@ -1333,8 +1334,6 @@ namespace DotRecast.Recast
                                                                                                  + " (max " + MAX_MESH_VERTS_POLY + "). Data can be corrupted.");
             }
 
-            ctx.StopTimer("MERGE_POLYMESH");
-
             return mesh;
         }
 

src/DotRecast.Recast/RecastMeshDetail.cs

@@ -1426,7 +1426,7 @@ namespace DotRecast.Recast
         public static RcPolyMeshDetail BuildPolyMeshDetail(RcTelemetry ctx, RcPolyMesh mesh, RcCompactHeightfield chf,
             float sampleDist, float sampleMaxError)
         {
-            ctx.StartTimer("POLYMESHDETAIL");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_POLYMESHDETAIL);
             if (mesh.nverts == 0 || mesh.npolys == 0)
             {
                 return null;
@@ -1610,16 +1610,15 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StopTimer("POLYMESHDETAIL");
             return dmesh;
         }
 
         /// @see rcAllocPolyMeshDetail, rcPolyMeshDetail
         private static RcPolyMeshDetail MergePolyMeshDetails(RcTelemetry ctx, RcPolyMeshDetail[] meshes, int nmeshes)
         {
-            RcPolyMeshDetail mesh = new RcPolyMeshDetail();
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_MERGE_POLYMESHDETAIL);
 
-            ctx.StartTimer("MERGE_POLYMESHDETAIL");
+            RcPolyMeshDetail mesh = new RcPolyMeshDetail();
 
             int maxVerts = 0;
             int maxTris = 0;
@@ -1680,7 +1679,6 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StopTimer("MERGE_POLYMESHDETAIL");
             return mesh;
         }
     }

src/DotRecast.Recast/RecastRasterization.cs

@@ -400,14 +400,12 @@ namespace DotRecast.Recast
         public static void RasterizeTriangle(RcHeightfield heightfield, float[] verts, int v0, int v1, int v2, int area,
             int flagMergeThreshold, RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_TRIANGLES");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
             RasterizeTri(verts, v0, v1, v2, area, heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs, inverseCellSize,
                 inverseCellHeight, flagMergeThreshold);
-
-            ctx.StopTimer("RASTERIZE_TRIANGLES");
         }
 
         /**
@@ -431,7 +429,7 @@ namespace DotRecast.Recast
         public static void RasterizeTriangles(RcHeightfield heightfield, float[] verts, int[] tris, int[] areaIds, int numTris,
             int flagMergeThreshold, RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_TRIANGLES");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
@@ -443,8 +441,6 @@ namespace DotRecast.Recast
                 RasterizeTri(verts, v0, v1, v2, areaIds[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
                     inverseCellSize, inverseCellHeight, flagMergeThreshold);
             }
-
-            ctx.StopTimer("RASTERIZE_TRIANGLES");
         }
 
         /**
@@ -468,7 +464,7 @@ namespace DotRecast.Recast
         public static void RasterizeTriangles(RcHeightfield heightfield, float[] verts, int[] areaIds, int numTris,
             int flagMergeThreshold, RcTelemetry ctx)
         {
-            ctx.StartTimer("RASTERIZE_TRIANGLES");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_RASTERIZE_TRIANGLES);
 
             float inverseCellSize = 1.0f / heightfield.cs;
             float inverseCellHeight = 1.0f / heightfield.ch;
@@ -480,8 +476,6 @@ namespace DotRecast.Recast
                 RasterizeTri(verts, v0, v1, v2, areaIds[triIndex], heightfield, heightfield.bmin, heightfield.bmax, heightfield.cs,
                     inverseCellSize, inverseCellHeight, flagMergeThreshold);
             }
-
-            ctx.StopTimer("RASTERIZE_TRIANGLES");
         }
     }
 }

src/DotRecast.Recast/RecastRegion.cs

@@ -580,7 +580,6 @@ namespace DotRecast.Recast
         }
 
 
-
         private static void RemoveAdjacentNeighbours(RcRegion reg)
         {
             // Remove adjacent duplicates.
@@ -1418,16 +1417,16 @@ namespace DotRecast.Recast
         /// @see rcCompactHeightfield, rcBuildRegions, rcBuildRegionsMonotone
         public static void BuildDistanceField(RcTelemetry ctx, RcCompactHeightfield chf)
         {
-            ctx.StartTimer("DISTANCEFIELD");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD);
-            int[] src = new int[chf.spanCount];
-            ctx.StartTimer("DISTANCEFIELD_DIST");
 
+            int[] src = new int[chf.spanCount];
+
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD_DIST);
             int maxDist = CalculateDistanceField(chf, src);
             chf.maxDistance = maxDist;
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD_DIST);
 
-            ctx.StopTimer("DISTANCEFIELD_DIST");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD_BLUR);
-
-            ctx.StartTimer("DISTANCEFIELD_BLUR");
 
             // Blur
             src = BoxBlur(chf, 1, src);
@@ -1435,9 +1434,7 @@ namespace DotRecast.Recast
             // Store distance.
             chf.dist = src;
 
-            ctx.StopTimer("DISTANCEFIELD_BLUR");
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_DISTANCEFIELD_BLUR);
-
-            ctx.StopTimer("DISTANCEFIELD");
         }
 
         private static void PaintRectRegion(int minx, int maxx, int miny, int maxy, int regId, RcCompactHeightfield chf,
@@ -1482,7 +1479,7 @@ namespace DotRecast.Recast
         public static void BuildRegionsMonotone(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea,
             int mergeRegionArea)
         {
-            ctx.StartTimer("REGIONS");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
 
             int w = chf.width;
             int h = chf.height;
@@ -1624,23 +1621,19 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StartTimer("REGIONS_FILTER");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
-
             // Merge regions and filter out small regions.
             List<int> overlaps = new List<int>();
             chf.maxRegions = MergeAndFilterRegions(ctx, minRegionArea, mergeRegionArea, id, chf, srcReg, overlaps);
 
             // Monotone partitioning does not generate overlapping regions.
-
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
-            ctx.StopTimer("REGIONS_FILTER");
 
             // Store the result out.
             for (int i = 0; i < chf.spanCount; ++i)
             {
                 chf.spans[i].reg = srcReg[i];
             }
-
-            ctx.StopTimer("REGIONS");
         }
 
         /// @par
@@ -1665,13 +1658,13 @@ namespace DotRecast.Recast
         public static void BuildRegions(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea,
             int mergeRegionArea)
         {
-            ctx.StartTimer("REGIONS");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
 
             int w = chf.width;
             int h = chf.height;
             int borderSize = chf.borderSize;
 
-            ctx.StartTimer("REGIONS_WATERSHED");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_WATERSHED);
 
             int LOG_NB_STACKS = 3;
             int NB_STACKS = 1 << LOG_NB_STACKS;
@@ -1732,14 +1725,14 @@ namespace DotRecast.Recast
 
                 // ctx->StopTimer(RC_TIMER_DIVIDE_TO_LEVELS);
 
-                ctx.StartTimer("REGIONS_EXPAND");
+                ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_EXPAND);
 
                 // Expand current regions until no empty connected cells found.
                 ExpandRegions(expandIters, level, chf, srcReg, srcDist, lvlStacks[sId], false);
 
-                ctx.StopTimer("REGIONS_EXPAND");
+                ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_EXPAND);
 
-                ctx.StartTimer("REGIONS_FLOOD");
+                ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FLOOD);
 
                 // Mark new regions with IDs.
                 for (int j = 0; j < lvlStacks[sId].Count; j += 3)
@@ -1756,15 +1749,15 @@ namespace DotRecast.Recast
                     }
                 }
 
-                ctx.StopTimer("REGIONS_FLOOD");
+                ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FLOOD);
             }
 
             // Expand current regions until no empty connected cells found.
             ExpandRegions(expandIters * 8, 0, chf, srcReg, srcDist, stack, true);
 
-            ctx.StopTimer("REGIONS_WATERSHED");
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_WATERSHED);
 
-            ctx.StartTimer("REGIONS_FILTER");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
 
             // Merge regions and filter out smalle regions.
             List<int> overlaps = new List<int>();
@@ -1776,20 +1769,18 @@ namespace DotRecast.Recast
                 ctx.Warn("rcBuildRegions: " + overlaps.Count + " overlapping regions.");
             }
 
-            ctx.StopTimer("REGIONS_FILTER");
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
 
             // Write the result out.
             for (int i = 0; i < chf.spanCount; ++i)
             {
                 chf.spans[i].reg = srcReg[i];
             }
-
-            ctx.StopTimer("REGIONS");
         }
 
         public static void BuildLayerRegions(RcTelemetry ctx, RcCompactHeightfield chf, int minRegionArea)
         {
-            ctx.StartTimer("REGIONS");
+            using var timer = ctx.ScopedTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS);
 
             int w = chf.width;
             int h = chf.height;
@@ -1930,21 +1921,19 @@ namespace DotRecast.Recast
                 }
             }
 
-            ctx.StartTimer("REGIONS_FILTER");
+            ctx.StartTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
 
             // Merge monotone regions to layers and remove small regions.
             List<int> overlaps = new List<int>();
             chf.maxRegions = MergeAndFilterLayerRegions(ctx, minRegionArea, id, chf, srcReg, overlaps);
 
-            ctx.StopTimer("REGIONS_FILTER");
+            ctx.StopTimer(RcTimerLabel.RC_TIMER_BUILD_REGIONS_FILTER);
 
             // Store the result out.
             for (int i = 0; i < chf.spanCount; ++i)
             {
                 chf.spans[i].reg = srcReg[i];
             }
-
-            ctx.StopTimer("REGIONS");
         }
     }
 }