/// <summary>
        /// TODO: Would prefer NotWorseThan(X, InTermsOf.Runtime), but leaving for later
        /// </summary>
        public static PerfAssertObjectWithSourceAndTarget <T> NotWorseRuntimeThan <T>(
            this PerfAssertObjectWithSource <T> source,
            Expression <Action <T> > perfBenchmark)
        {
            // TODO: COPY PASTE!!!
            string targetName = ExpressionUtils.GetPerfBenchmarkName(perfBenchmark);

            var perfAssert = new PerfAssertObjectWithSourceAndTarget <T>(
                source.SourceName,
                targetName: targetName,
                benchmarkRunCache: source.BenchmarkRunCache);

            var results = source.BenchmarkRunCache.GetResults(perfAssert);

            var speedMetricsByBenchmark = results
                                          .ToDictionary(
                result => result.BenchmarkName,
                result =>
            {
                AggregateMetrics timingMetricValues = result.StatsByMetric
                                                      .Single/* TODO: Error handling to help developers with usage */ (kvp => kvp.Key is TimingMetricName /* Counter, Gc, Memory, Timing */)
                                                      .Value;
                return(timingMetricValues);
            });
            var speedMetricForSource = speedMetricsByBenchmark[source.SourceName] /* TODO: Error handling */;
            var speedMetricForTarget = speedMetricsByBenchmark[targetName] /* TODO: Error handling */;

            // Run the validation, and wrap the exception with a meaningful message
            //AssertionFailedExceptionWrapper.Wrap(
            //    () =>
            AggregateMetricsAssertions.FirstIsNotSlower(
                first: speedMetricForSource,
                second: speedMetricForTarget)
            ;
            //        ,
            //ex => new AssertFailedException($"Expected {source.SourceName} to not be slower than {targetName}.\r\n"
            //                                + $"{ex.Message}", ex));
            //AssertionFailedExceptionWrapper.Wrap(
            //    () =>
            AggregateMetricsAssertions.FirstDoesNotHaveHigherVariance(
                first: speedMetricForSource,
                second: speedMetricForTarget)
            ;
            //,
            //ex => new AssertFailedException(
            //    $"Expected {source.SourceName} to not have more variance(/noise)/less-reliability(/reproducibility) than {targetName}.\r\n"
            //    + $"{ex.Message}",
            //    ex));

            return(perfAssert);
        }
        // TODO: COPY PASTE!!!
        #region Different types of assertions (memory/speed/etc)

        // TODO: COPY PASTE!!!
        public static PerfAssertObjectWithSourceAndTarget <T> FasterThan <T>(
            this PerfAssertObjectWithSource <T> source,
            Expression <Action <T> > perfBenchmark)
        {
            // TODO: COPY PASTE!!!
            string targetName = ExpressionUtils.GetPerfBenchmarkName(perfBenchmark);

            var perfAssert = new PerfAssertObjectWithSourceAndTarget <T>(
                source.SourceName,
                targetName: targetName,
                benchmarkRunCache: source.BenchmarkRunCache);

            var results = source.BenchmarkRunCache.GetResults(perfAssert);

            var speedMetricsByBenchmark = results
                                          .ToDictionary(
                result => result.BenchmarkName,
                result =>
            {
                AggregateMetrics timingMetricValues = result.StatsByMetric
                                                      .Single/* TODO: Error handling to help developers with usage */ (kvp => kvp.Key is TimingMetricName /* Counter, Gc, Memory, Timing */)
                                                      .Value;
                return(timingMetricValues);
            });
            var speedMetricForSource = speedMetricsByBenchmark[source.SourceName] /* TODO: Error handling */;
            var speedMetricForTarget = speedMetricsByBenchmark[targetName] /* TODO: Error handling */;

            // Run the validation, and wrap the exception with a meaningful message
            // TODO: Pass the 'meaningful message' down so we call the user delegate with it
            //AssertionFailedExceptionWrapper.Wrap(
            //    () =>
            AggregateMetricsAssertions.FirstIsFaster(
                first: speedMetricForSource,
                second: speedMetricForTarget)
            ;
            //        ,
            //ex => new Exception($"Expected {source.SourceName} to be faster than {targetName}", ex));

            return(perfAssert);
        }