perf: use picoev as default Server for improve response concurrency

examples/run_benchmark.ps1

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+# veb vs v-hono 性能对比测试脚本
+# 运行: .\run_benchmark.ps1
+
+Write-Host ""
+Write-Host "╔═══════════════════════════════════════════════════════════════╗" -ForegroundColor Cyan
+Write-Host "║         veb vs v-hono 性能对比测试                            ║" -ForegroundColor Cyan
+Write-Host "╚═══════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
+Write-Host ""
+
+# 检查 V 编译器
+if (-not (Get-Command v -ErrorAction SilentlyContinue)) {
+    Write-Host "❌ 未找到 V 编译器，请先安装 V 语言" -ForegroundColor Red
+    exit 1
+}
+
+Write-Host "✅ V 编译器已安装" -ForegroundColor Green
+Write-Host ""
+
+# 菜单
+Write-Host "请选择测试类型:" -ForegroundColor Yellow
+Write-Host "  1. 路由匹配性能测试 (不需要启动服务器)"
+Write-Host "  2. HTTP 压测 (需要先启动服务器)"
+Write-Host "  3. 启动 veb 服务器 (端口 8080)"
+Write-Host "  4. 启动 v-hono 服务器 (端口 8081)"
+Write-Host "  5. 编译所有测试文件"
+Write-Host "  6. 退出"
+Write-Host ""
+
+$choice = Read-Host "请输入选项 (1-6)"
+
+switch ($choice) {
+    "1" {
+        Write-Host ""
+        Write-Host "运行路由匹配性能测试..." -ForegroundColor Cyan
+        v run benchmark_veb_vs_hono.v
+    }
+    "2" {
+        Write-Host ""
+        Write-Host "运行 HTTP 压测..." -ForegroundColor Cyan
+        Write-Host "请确保已在其他终端启动服务器:" -ForegroundColor Yellow
+        Write-Host "  - veb:    v run server_veb.v   (端口 8080)"
+        Write-Host "  - v-hono: v run server_hono.v  (端口 8081)"
+        Write-Host ""
+        v run http_benchmark.v
+    }
+    "3" {
+        Write-Host ""
+        Write-Host "启动 veb 服务器 (端口 8080)..." -ForegroundColor Cyan
+        v run server_veb.v
+    }
+    "4" {
+        Write-Host ""
+        Write-Host "启动 v-hono 服务器 (端口 8081)..." -ForegroundColor Cyan
+        v run server_hono.v
+    }
+    "5" {
+        Write-Host ""
+        Write-Host "编译所有测试文件..." -ForegroundColor Cyan
+        
+        Write-Host "编译 benchmark_veb_vs_hono.v..."
+        v -prod benchmark_veb_vs_hono.v -o benchmark_veb_vs_hono.exe
+        
+        Write-Host "编译 server_veb.v..."
+        v -prod server_veb.v -o server_veb.exe
+        
+        Write-Host "编译 server_hono.v..."
+        v -prod server_hono.v -o server_hono.exe
+        
+        Write-Host "编译 http_benchmark.v..."
+        v -prod http_benchmark.v -o http_benchmark.exe
+        
+        Write-Host ""
+        Write-Host "✅ 编译完成!" -ForegroundColor Green
+    }
+    "6" {
+        Write-Host "退出" -ForegroundColor Yellow
+        exit 0
+    }
+    default {
+        Write-Host "无效选项" -ForegroundColor Red
+    }
+}