Add benchmarks.

Author: danieleggert

Benchmarks/Benchmarks/URL/BenchmarkURL.swift

@@ -231,4 +231,50 @@ let benchmarks = {
         }
     }
 
+    Benchmark("URL-Template-parsing") { benchmark in
+        for _ in benchmark.scaledIterations {
+            blackHole(URL.Template("/api/{version}/accounts/{accountId}/transactions/{transactionId}{?expand*,fields*,embed*,format}")!)
+            blackHole(URL.Template("/special/{+a}/details")!)
+            blackHole(URL.Template("/documents/{documentId}{#section,paragraph}")!)
+        }
+    }
+
+    let templates = [
+        URL.Template("/var/{var}/who/{who}/x/{x}{?keys*,count*,list*,y}")!,
+        URL.Template("/special/{+keys}/details")!,
+        URL.Template("x/y/{#path:6}/here")!,
+        URL.Template("a/b{/var,x}/here")!,
+        URL.Template("a{?var,y}")!,
+    ]
+
+    var variables: [URL.Template.VariableName: URL.Template.Value] = [
+        "count": ["one", "two", "three"],
+        "dom": ["example", "com"],
+        "dub": "me/too",
+        "hello": "Hello World!",
+        "half": "50%",
+        "var": "value",
+        "who": "fred",
+        "base": "http://example.com/home/",
+        "path": "/foo/bar",
+        "list": ["red", "green", "blue"],
+        "keys": [
+            "semi": ";",
+            "dot": ".",
+            "comma": ",",
+        ],
+        "v": "6",
+        "x": "1024",
+        "y": "768",
+        "empty": "",
+        "empty_keys": [:],
+    ]
+
+    Benchmark("URL-Template-expansion") { benchmark in
+        for _ in benchmark.scaledIterations {
+            for t in templates {
+                blackHole(URL(template: t, variables: variables))
+            }
+        }
+    }
 }