anchor.diff:      /// https://github.com/Albacore/albacore/#versionizer and
       /// https://github.com/haf/semver to manage your versions in a CI-environment.</param>
       /// <param name="tests">The performance tests to run against the subject and the alternatives.</param>
  -    let testPerfHistoryWithConfig (conf : PerfHistoryConf) name (subject : 'a) (testRunId : string) (tests : 'a PerfTest list) =
  +    let testPerfHistoryWithConfig (conf : PerfHistoryConf) name subject (testRunId: string) tests =
           let tester =
               new PastImplementationComparer<_>(
                   subject, testRunId, conf.historyFile, conf.comparer,
                   conf.verbose, conf.throwOnError, conf.overwrite)
   
           testCase name <| fun _ ->
  -            let results = PerfTest.run (fun () -> tester :> PerformanceTester<'a>) tests
  +            let results = PerfTest.run (fun () -> tester :> PerformanceTester<_>) tests
               tester.PersistCurrentResults()
               conf.handleResults(conf.historyFile, results)
   
  
positive.code:     /// <param name="subject">Implementation under test.</param>
      /// <param name="alternatives">Secondary implementations to be compared against.</param>
      /// <param name="tests">The performance tests to run against the subject and the alternatives.</param>
      let testPerfImplsWithConfig (conf : PerfImplsConf) name (subject : 'a) (alternatives : 'a list) (tests : PerfTest<'a> list) =
          let tester () =
              new ImplementationComparer<_>(subject, alternatives, conf.comparer, conf.verbose, conf.throwOnError)
                  :> PerformanceTester<'a>
  
          testCase name <| fun _ ->
              let results = PerfTest.run tester tests
  
negative.code:     /// https://github.com/Albacore/albacore/#versionizer and
      /// https://github.com/haf/semver to manage your versions in a CI-environment.</param>
      /// <param name="tests">The performance tests to run against the subject and the alternatives.</param>
      let testPerfHistory name subject (testRunId : string) =
          testPerfHistoryWithConfig (PerfHistoryConf.Defaults name) name subject testRunId
  
  module private ExampleUsage =
  