refactor(benchmark,proxy): 改进错误处理，忽略未使用返回值

- benchmark tools 使用空白标识符忽略明确不关心的返回值
- proxy bench 测试统一错误处理风格
- 符合 Go 最佳实践，避免编译器警告

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/benchmark/tools/loadgen.go

@@ -159,6 +159,6 @@ func (lg *FasthttpLoadGenerator) RunParallel(pb *testing.PB) {
 	for pb.Next() {
 		req.SetRequestURI("http://" + lg.addr + "/")
 		req.Header.SetMethod("GET")
-		lg.client.Do(req, resp)
+		_ = lg.client.Do(req, resp)
 	}
-}
+}

internal/benchmark/tools/mock_backend.go

@@ -56,14 +56,14 @@ func StartMockFasthttpBackend(config MockBackendConfig) (string, func()) {
 
 	// Start server in background
 	go func() {
-		mb.server.Serve(ln)
+		_ = mb.server.Serve(ln)
 	}()
 
 	addr := "127.0.0.1:0" // In-memory listener address
 
 	cleanup := func() {
-		mb.server.Shutdown()
-		ln.Close()
+		_ = mb.server.Shutdown()
+		_ = ln.Close()
 	}
 
 	return addr, cleanup
@@ -79,16 +79,16 @@ func (mb *MockBackend) handler(ctx *fasthttp.RequestCtx) {
 	case ModeDelay:
 		time.Sleep(config.Delay)
 		ctx.SetStatusCode(config.StatusCode)
-		ctx.Write(config.Body)
+		_, _ = ctx.Write(config.Body)
 
 	case ModeError:
 		if rand.Float64() < config.ErrorRate {
 			ctx.SetStatusCode(fasthttp.StatusInternalServerError)
-			ctx.WriteString("internal server error")
+			_, _ = ctx.WriteString("internal server error")
 			return
 		}
 		ctx.SetStatusCode(config.StatusCode)
-		ctx.Write(config.Body)
+		_, _ = ctx.Write(config.Body)
 
 	case ModeRandomResponse:
 		codes := []int{
@@ -99,11 +99,11 @@ func (mb *MockBackend) handler(ctx *fasthttp.RequestCtx) {
 			fasthttp.StatusNotFound,
 		}
 		ctx.SetStatusCode(codes[rand.Intn(len(codes))])
-		ctx.Write(config.Body)
+		_, _ = ctx.Write(config.Body)
 
 	default: // ModeFixed
 		ctx.SetStatusCode(config.StatusCode)
-		ctx.Write(config.Body)
+		_, _ = ctx.Write(config.Body)
 	}
 }
 

internal/proxy/proxy_bench_test.go

@@ -23,12 +23,12 @@ func setupMockBackend(body []byte) (string, func()) {
 	server := &fasthttp.Server{
 		Handler: func(ctx *fasthttp.RequestCtx) {
 			ctx.SetStatusCode(fasthttp.StatusOK)
-			ctx.Write(body)
+			_, _ = ctx.Write(body)
 		},
 	}
 
 	go func() {
-		server.Serve(ln)
+		_ = server.Serve(ln)
 	}()
 
 	// 等待服务器启动
@@ -36,7 +36,7 @@ func setupMockBackend(body []byte) (string, func()) {
 
 	addr := ln.Addr().String()
 	cleanup := func() {
-		ln.Close()
+		_ = ln.Close()
 	}
 
 	return addr, cleanup
@@ -45,7 +45,7 @@ func setupMockBackend(body []byte) (string, func()) {
 // BenchmarkProxyForward 基准测试代理转发性能。
 func BenchmarkProxyForward(b *testing.B) {
 	testCases := []struct {
-		name      string
+		name        string
 		concurrency int
 	}{
 		{"concurrency1", 1},
@@ -251,7 +251,7 @@ func BenchmarkProxyHostClient(b *testing.B) {
 		req.SetRequestURI("http://" + addr + "/api/test")
 		req.Header.SetMethod(fasthttp.MethodGet)
 
-		client.Do(req, resp)
+		_ = client.Do(req, resp)
 
 		fasthttp.ReleaseRequest(req)
 		fasthttp.ReleaseResponse(resp)
@@ -281,7 +281,7 @@ func BenchmarkProxyHostClientParallel(b *testing.B) {
 			req.SetRequestURI("http://" + addr + "/api/test")
 			req.Header.SetMethod(fasthttp.MethodGet)
 
-			client.Do(req, resp)
+			_ = client.Do(req, resp)
 
 			fasthttp.ReleaseRequest(req)
 			fasthttp.ReleaseResponse(resp)