Add Message.with to the performance suite

Author: Lukasa

Performance/generators/swift.sh

@@ -98,6 +98,10 @@ extension Harness {
         populateFields(of: &message)
       }
 
+      message = measureSubtask("Populate fields with with") {
+        return populateFieldsWithWith()
+      }
+
       // Exercise binary serialization.
       let data = try measureSubtask("Encode binary") {
         return try message.serializedData()
@@ -140,6 +144,20 @@ EOF
 
   cat >> "$gen_harness_path" <<EOF
   }
+
+  private func populateFieldsWithWith() -> PerfMessage {
+    return PerfMessage.with { message in
+EOF
+
+  if [[ "$proto_type" == "homogeneous" ]]; then
+    generate_swift_homogenerous_populate_fields_body
+  else
+    generate_swift_heterogenerous_populate_fields_body
+  fi
+
+  cat >> "$gen_harness_path" <<EOF
+    }
+  }
 }
 EOF
 }

Performance/js/harness-visualization.js

@@ -3,6 +3,7 @@
   // on the plot axis.
   var benchmarks = [
     'New message', 'Populate fields',
+    'Populate fields with with',
     'Encode binary', 'Decode binary',
     'Encode JSON', 'Decode JSON',
     'Encode text', 'Decode text',