Auto-hide feature added for columns via Exception and Threading diagnoser configuration

src/BenchmarkDotNet/Attributes/ExceptionDiagnoserAttribute.cs

@@ -9,6 +9,10 @@ public class ExceptionDiagnoserAttribute : Attribute, IConfigSource
     {
         public IConfig Config { get; }
 
-        public ExceptionDiagnoserAttribute() => Config = ManualConfig.CreateEmpty().AddDiagnoser(ExceptionDiagnoser.Default);
+        /// <param name="displayExceptions">Display Exceptions column. True by default.</param>
+        public ExceptionDiagnoserAttribute(bool displayExceptions = true)
+        {
+            Config = ManualConfig.CreateEmpty().AddDiagnoser(new ExceptionDiagnoser(new ExceptionDiagnoserConfig(displayExceptions)));
+        }
     }
-}
+}

src/BenchmarkDotNet/Attributes/ThreadingDiagnoserAttribute.cs

@@ -9,6 +9,11 @@ public class ThreadingDiagnoserAttribute : Attribute, IConfigSource
     {
         public IConfig Config { get; }
 
-        public ThreadingDiagnoserAttribute() => Config = ManualConfig.CreateEmpty().AddDiagnoser(ThreadingDiagnoser.Default);
+        /// <param name="displayWorkItemsColumn">Display Work Items column. True by default.</param>
+        /// <param name="displayLockContentionsColumn">Display Lock Contentions column. True by default.</param>
+        public ThreadingDiagnoserAttribute(bool displayWorkItemsColumn = true, bool displayLockContentionsColumn = true)
+        {
+            Config = ManualConfig.CreateEmpty().AddDiagnoser(new ThreadingDiagnoser(new ThreadingDiagnoserConfig(displayWorkItemsColumn, displayLockContentionsColumn)));
+        }
     }
 }

src/BenchmarkDotNet/Diagnosers/ExceptionDiagnoser.cs

@@ -14,7 +14,11 @@ namespace BenchmarkDotNet.Diagnosers
 {
     public class ExceptionDiagnoser : IDiagnoser
     {
-        public static readonly ExceptionDiagnoser Default = new ExceptionDiagnoser();
+        public static readonly ExceptionDiagnoser Default = new ExceptionDiagnoser(new ExceptionDiagnoserConfig(true));
+
+        public ExceptionDiagnoser(ExceptionDiagnoserConfig config) => Config = config;
+
+        public ExceptionDiagnoserConfig Config { get; }
 
         private ExceptionDiagnoser() { }
 
@@ -32,7 +36,10 @@ public void Handle(HostSignal signal, DiagnoserActionParameters parameters) { }
 
         public IEnumerable<Metric> ProcessResults(DiagnoserResults results)
         {
-            yield return new Metric(ExceptionsFrequencyMetricDescriptor.Instance, results.ExceptionFrequency);
+            if (!Config.DisplayExceptionsIfZeroValue && results.ExceptionFrequency == 0)
+            {
+                yield return new Metric(ExceptionsFrequencyMetricDescriptor.Instance, results.ExceptionFrequency);
+            }
         }
 
         public IEnumerable<ValidationError> Validate(ValidationParameters validationParameters) => Enumerable.Empty<ValidationError>();

src/BenchmarkDotNet/Diagnosers/ExceptionDiagnoserConfig.cs

@@ -0,0 +1,15 @@
+using JetBrains.Annotations;
+
+namespace BenchmarkDotNet.Diagnosers;
+
+public class ExceptionDiagnoserConfig
+{
+    /// <param name="displayExceptionsIfZeroValue">Display Exceptions column if it's value is not calculated. True by default.</param>
+    [PublicAPI]
+    public ExceptionDiagnoserConfig(bool displayExceptionsIfZeroValue = true)
+    {
+        DisplayExceptionsIfZeroValue = displayExceptionsIfZeroValue;
+    }
+
+    public bool DisplayExceptionsIfZeroValue { get; }
+}

src/BenchmarkDotNet/Diagnosers/ThreadingDiagnoser.cs

@@ -15,7 +15,11 @@ namespace BenchmarkDotNet.Diagnosers
 {
     public class ThreadingDiagnoser : IDiagnoser
     {
-        public static readonly ThreadingDiagnoser Default = new ThreadingDiagnoser();
+        public static readonly ThreadingDiagnoser Default = new ThreadingDiagnoser(new ThreadingDiagnoserConfig(true, true));
+
+        public ThreadingDiagnoser(ThreadingDiagnoserConfig config) => Config = config;
+
+        public ThreadingDiagnoserConfig Config { get; }
 
         private ThreadingDiagnoser() { }
 
@@ -33,8 +37,15 @@ public void Handle(HostSignal signal, DiagnoserActionParameters parameters) { }
 
         public IEnumerable<Metric> ProcessResults(DiagnoserResults results)
         {
-            yield return new Metric(CompletedWorkItemCountMetricDescriptor.Instance, results.ThreadingStats.CompletedWorkItemCount / (double)results.ThreadingStats.TotalOperations);
-            yield return new Metric(LockContentionCountMetricDescriptor.Instance, results.ThreadingStats.LockContentionCount / (double)results.ThreadingStats.TotalOperations);
+            if (!Config.DisplayWorkItemsColumnIfZeroValue && results.ThreadingStats.CompletedWorkItemCount == 0)
+            {
+                yield return new Metric(CompletedWorkItemCountMetricDescriptor.Instance, results.ThreadingStats.CompletedWorkItemCount / (double)results.ThreadingStats.TotalOperations);
+            }
+
+            if (!Config.DisplayLockContentionsColumnIfZeroValue && results.ThreadingStats.LockContentionCount == 0)
+            {
+                yield return new Metric(LockContentionCountMetricDescriptor.Instance, results.ThreadingStats.LockContentionCount / (double)results.ThreadingStats.TotalOperations);
+            }
         }
 
         public IEnumerable<ValidationError> Validate(ValidationParameters validationParameters)

src/BenchmarkDotNet/Diagnosers/ThreadingDiagnoserConfig.cs

@@ -0,0 +1,18 @@
+using JetBrains.Annotations;
+
+namespace BenchmarkDotNet.Diagnosers;
+
+public class ThreadingDiagnoserConfig
+{
+    /// <param name="displayWorkItemsColumnIfZeroValue">Display Work Items column if it's value is not calculated. True by default.</param>
+    /// <param name="displayLockContentionsColumnIfZeroValue">Display Lock Contentions column if it's value is not calculated. True by default.</param>
+    [PublicAPI]
+    public ThreadingDiagnoserConfig(bool displayWorkItemsColumnIfZeroValue = true, bool displayLockContentionsColumnIfZeroValue = true)
+    {
+        DisplayWorkItemsColumnIfZeroValue = displayWorkItemsColumnIfZeroValue;
+        DisplayLockContentionsColumnIfZeroValue = displayLockContentionsColumnIfZeroValue;
+    }
+    public bool DisplayWorkItemsColumnIfZeroValue { get; }
+
+    public bool DisplayLockContentionsColumnIfZeroValue { get; }
+}