perf: use picoev as default Server for improve response concurrency

examples/simple_benchmark.v

@@ -0,0 +1,93 @@
+// 简单 HTTP 压测 - veb vs v-hono
+// v run simple_benchmark.v
+
+module main
+
+import net.http
+import time
+
+const requests = 50
+
+fn main() {
+	println('╔═══════════════════════════════════════════════════════════════╗')
+	println('║           简单 HTTP 压测 - veb vs v-hono                      ║')
+	println('╚═══════════════════════════════════════════════════════════════╝')
+	println('')
+	
+	// 测试 veb
+	println('测试 veb (http://127.0.0.1:8080/)...')
+	veb_result := benchmark_server('http://127.0.0.1:8080/')
+	println('  结果: ${veb_result.rps:.0} req/s | avg: ${veb_result.avg_ms:.2}ms | 成功: ${veb_result.success}/${veb_result.total}')
+	
+	// 测试 v-hono
+	println('')
+	println('测试 v-hono (http://127.0.0.1:8081/)...')
+	hono_result := benchmark_server('http://127.0.0.1:8081/')
+	println('  结果: ${hono_result.rps:.0} req/s | avg: ${hono_result.avg_ms:.2}ms | 成功: ${hono_result.success}/${hono_result.total}')
+	
+	// 对比
+	println('')
+	println('═══════════════════════════════════════════════════════════════')
+	if veb_result.rps > 0 && hono_result.rps > 0 {
+		if hono_result.rps > veb_result.rps {
+			ratio := hono_result.rps / veb_result.rps
+			println('v-hono 快 ${ratio:.2}x')
+		} else {
+			ratio := veb_result.rps / hono_result.rps
+			println('veb 快 ${ratio:.2}x')
+		}
+	}
+	println('═══════════════════════════════════════════════════════════════')
+}
+
+struct Result {
+	total   int
+	success int
+	rps     f64
+	avg_ms  f64
+}
+
+fn benchmark_server(url string) Result {
+	// 先检查服务器
+	http.get(url) or {
+		println('  ⚠️ 服务器不可用')
+		return Result{}
+	}
+	
+	mut success := 0
+	mut total_ms := f64(0)
+	
+	start := time.now()
+	
+	for i in 0 .. requests {
+		req_start := time.now()
+		resp := http.get(url) or {
+			continue
+		}
+		req_ms := f64(time.since(req_start).microseconds()) / 1000.0
+		
+		if resp.status_code == 200 {
+			success++
+		}
+		total_ms += req_ms
+		
+		// 进度
+		if (i + 1) % 10 == 0 {
+			print('.')
+		}
+	}
+	println('')
+	
+	elapsed := time.since(start)
+	elapsed_ms := elapsed.milliseconds()
+	
+	rps := if elapsed_ms > 0 { f64(requests) * 1000.0 / f64(elapsed_ms) } else { 0.0 }
+	avg_ms := if requests > 0 { total_ms / f64(requests) } else { 0.0 }
+	
+	return Result{
+		total: requests
+		success: success
+		rps: rps
+		avg_ms: avg_ms
+	}
+}