实现毫秒级低延迟网络的技术方案

// Linux TCP 优化配置示例 # 启用TCP快速打开 echo 3 > /proc/sys/net/ipv4/tcp_fastopen # 调整TCP缓冲区大小 echo 'net.core.rmem_max = 67108864' >> /etc/sysctl.conf echo 'net.core.wmem_max = 67108864' >> /etc/sysctl.conf echo 'net.ipv4.tcp_rmem = 4096 87380 67108864' >> /etc/sysctl.conf echo 'net.ipv4.tcp_wmem = 4096 65536 67108864' >> /etc/sysctl.conf # 启用BBR拥塞控制 echo 'net.core.default_qdisc = fq' >> /etc/sysctl.conf echo 'net.ipv4.tcp_congestion_control = bbr' >> /etc/sysctl.conf # 减少TIME_WAIT状态时间 echo 'net.ipv4.tcp_tw_reuse = 1' >> /etc/sysctl.conf echo 'net.ipv4.tcp_fin_timeout = 30' >> /etc/sysctl.conf # 应用配置 sysctl -p

// 低延迟数据传输示例 - 使用WebSocket + 二进制协议 class LowLatencyTransport { constructor(endpoint) { this.socket = new WebSocket(endpoint); this.buffer = new ArrayBuffer(1024); this.view = new DataView(this.buffer); this.sequence = 0; // 启用二进制传输 this.socket.binaryType = 'arraybuffer'; } // 高效数据编码 encodeMessage(type, data) { this.view.setUint8(0, type); // 消息类型 (1字节) this.view.setUint32(1, Date.now()); // 时间戳 (4字节) this.view.setUint32(5, this.sequence++); // 序列号 (4字节) // 可变数据负载 let offset = 9; for (let key in data) { const value = data[key]; if (typeof value === 'number') { this.view.setFloat64(offset, value); offset += 8; } // ... 其他数据类型处理 } return this.buffer.slice(0, offset); } // 发送优化 - 批量处理 sendBatch(messages) { if (this.socket.readyState === WebSocket.OPEN) { const batchBuffer = new ArrayBuffer(messages.length * 64); const batchView = new DataView(batchBuffer); let offset = 0; messages.forEach(msg => { const encoded = this.encodeMessage(msg.type, msg.data); batchView.setUint8(offset, encoded.byteLength); offset += 1; // 复制数据到批量缓冲区 new Uint8Array(batchBuffer, offset, encoded.byteLength) .set(new Uint8Array(encoded)); offset += encoded.byteLength; }); this.socket.send(batchBuffer.slice(0, offset)); } } }