init

Sources/bench/main.swift

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+// Copyright 2024 The NATS Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+import Nats
+
+if CommandLine.arguments.count != 4 {
+    exit(usage())
+}
+
+let cmd = CommandLine.arguments[1]
+
+if cmd != "pub" {
+    exit(usage())
+}
+
+let subject = CommandLine.arguments[2]
+guard let msgs = Int(CommandLine.arguments[3]) else {
+    exit(usage())
+}
+
+let nats = NatsClientOptions()
+    .url(URL(string: ProcessInfo.processInfo.environment["NATS_URL"] ?? "nats://localhost:4222")!)
+    .build()
+
+print("connect")
+try await nats.connect()
+
+let data = Data(repeating: 0, count: 128)
+
+print("start")
+let now = DispatchTime.now()
+
+if cmd == "pub" {
+    try await pub()
+}
+
+let elapsed = DispatchTime.now().uptimeNanoseconds - now.uptimeNanoseconds
+let msgsPerSec: Double = Double(msgs) / (Double(elapsed) / 1_000_000_000)
+print("elapsed: \(elapsed / 1_000_000)ms ~ \(msgsPerSec) msgs/s")
+
+func pub() async throws {
+    print("publish")
+    for _ in 1...msgs {
+        try await nats.publish(data, subject: subject)
+    }
+
+    print("flush")
+    _ = try await nats.rtt()
+}
+
+func usage() -> Int32 {
+    print("Usage: bench pub <subject> <msgs>")
+    return 2
+}