View store benchmark (#1518)

* Add a benchmark for view stores.

* wip

* wip

Author: mbrandonw

Sources/swift-composable-architecture-benchmark/ViewStore.swift

@@ -0,0 +1,21 @@
+import Benchmark
+import Combine
+import ComposableArchitecture
+import Foundation
+
+let viewStoreSuite = BenchmarkSuite(name: "ViewStore") {
+  let store = Store(
+    initialState: 0,
+    reducer: EmptyReducer<Int, Void>()
+  )
+
+  $0.benchmark("Create view store to send action") {
+    doNotOptimizeAway(ViewStore(store).send(()))
+  }
+
+  let viewStore = ViewStore(store)
+
+  $0.benchmark("Send action to pre-created view store") {
+    doNotOptimizeAway(viewStore.send(()))
+  }
+}

Sources/swift-composable-architecture-benchmark/main.swift

@@ -6,4 +6,5 @@ Benchmark.main([
   dependenciesSuite,
   effectSuite,
   storeScopeSuite,
+  viewStoreSuite,
 ])