Adding more F# .fs samples. Fixes #1814

samples/F#/PerformanceTesters.fs

@@ -0,0 +1,68 @@
+namespace Nessos.FsPickler.Tests
+
+    open PerfUtil
+    open PerfUtil.NUnit
+
+    open NUnit.Framework
+
+    open Nessos.FsPickler
+    open Nessos.FsPickler.Json
+
+    [<AbstractClass>]
+    type PerfTester () =
+        inherit NUnitPerf<Serializer> ()
+
+        let tests = PerfTest.OfModuleMarker<PerformanceTests.Marker> ()
+
+        override __.PerfTests = tests
+
+
+    type ``Serializer Comparison`` () =
+        inherit PerfTester()
+
+        let fsp = FsPickler.initBinary()
+        let bfs = new BinaryFormatterSerializer() :> Serializer
+        let ndc = new NetDataContractSerializer() :> Serializer
+        let jdn = new JsonDotNetSerializer() :> Serializer
+        let bdn = new JsonDotNetBsonSerializer () :> Serializer
+        let pbn = new ProtoBufSerializer() :> Serializer
+        let ssj = new ServiceStackJsonSerializer() :> Serializer
+        let sst = new ServiceStackTypeSerializer() :> Serializer
+
+        let comparer = new WeightedComparer(spaceFactor = 0.2, leastAcceptableImprovementFactor = 1.)
+        let tester = new ImplementationComparer<_>(fsp, [bfs;ndc;jdn;bdn;pbn;ssj;sst], throwOnError = true, warmup = true, comparer = comparer)
+
+        override __.PerfTester = tester :> _
+        
+
+    type ``FsPickler Formats Comparison`` () =
+        inherit PerfTester ()
+
+        let binary = FsPickler.initBinary()
+        let json = FsPickler.initJson()
+        let bson = FsPickler.initBson()
+        let xml = FsPickler.initXml()
+
+        let tester = new ImplementationComparer<_>(binary, [json ; bson; xml], warmup = true, throwOnError = false)
+
+        override __.PerfTester = tester :> _
+
+
+    type ``Past FsPickler Versions Comparison`` () =
+        inherit PerfTester ()
+
+        let persistResults = true
+        let persistenceFile = "fspPerf.xml"
+
+        let fsp = FsPickler.initBinary()
+        let version = typeof<FsPickler>.Assembly.GetName().Version
+        let comparer = new WeightedComparer(spaceFactor = 0.2, leastAcceptableImprovementFactor = 0.8)
+        let tester = 
+            new PastImplementationComparer<Serializer>(
+                fsp, version, historyFile = persistenceFile, throwOnError = true, warmup = true, comparer = comparer)
+
+        override __.PerfTester = tester :> _
+
+        [<TestFixtureTearDown>]
+        member __.Persist() =
+            if persistResults then tester.PersistCurrentResults ()