# tcp\_defer\_accept
启用tcp\_defer\_accept特性，可以设置为一个数值，表示当一个TCP连接有数据发送时才触发accept。
~~~
tcp_defer_accept => 5
~~~
启用tcp\_defer\_accept特性后，accept和onConnect对应的时间会发生变化。如果设置为5秒：
* 客户端连接到服务器后不会立即触发accept
* 在5秒内客户端发送数据，此时会同时顺序触发accept/onConnect/onReceive
* 在5秒内客户端没有发送任何数据，此时会触发accept/onConnect
> tcp\_defer\_accept的可以提高Accept操作的效率
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- 高级
- Swoole的实现
- Reactor线程
- Manager进程
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- Reactor、Worker、TaskWorker的关系
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- TCP/UDP压测工具
- swoole服务器如何做到无人值守100%可用
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- 守护进程程序常用数据结构
- 队列（Queue）
- 堆（Heap）
- 定长数组（SplFixedArray）
- 使用jemalloc优化swoole内存分配性能
- C开发者如何使用Swoole
- C++开发者如何使用Swoole
- 使用systemd管理swoole服务
- 网卡中断设置
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- 协程CPU密集场景调度实现
- 其他
- 函数列表
- swoole_set_process_name
- swoole_version
- swoole_strerror
- swoole_errno
- swoole_get_local_ip
- swoole_clear_dns_cache
- swoole_get_local_mac
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- swoole_last_error
- Swoole社区
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- 附录：Linux信号列表
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- 附录：strace工具的使用
- 附录：gdb工具的使用
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- 附录：perf工具的使用
- 附录：编译PHP扩展的相关工具
- 备用：已移除的历史特性
- swoole_server->handler
- task_worker_max
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- onTimer
- swoole_timer_add
- swoole_timer_del
- swoole_get_mysqli_sock
- swoole_mysql_query
- onMasterConnect
- onMasterClose
- Nginx/Golang/Swoole/Node.js的性能对比
- Coroutine::call_user_func
- Coroutine::call_user_func_array
- Coroutine\Channel::select
- task_async
- 历史：版本更新记录（1.x）
- 1.10.3
- 1.10.2
- 1.10.1
- 1.10.0
- 1.9.23
- 1.9.22
- 1.9.19
- 1.9.18
- 1.9.17
- 1.9.16
- 1.9.15
- 1.9.14
- 1.9.12
- 1.9.11
- 1.9.9
- 1.9.7
- 1.9.6
- 1.9.5
- 1.9.4
- 1.9.3
- 1.9.2
- 1.9.1
- 1.9.0
- 1.8.13
- 1.8.12
- 1.8.11
- 1.8.10
- 1.8.9
- 1.8.8
- 1.8.7
- 1.8.6
- 1.8.5
- 1.8.4
- 1.8.3
- 1.8.2
- 1.8.1
- 1.8.0
- 1.7.22
- 1.7.21
- 1.7.20
- 1.7.19
- 1.7.18
- 1.7.17
- 1.7.16
- 1.7.15
- 1.7.14
- 1.7.13
- 1.7.12
- 1.7.11
- 1.7.10
- 1.7.9
- 1.7.8
- 1.7.7
- 1.7.6
- 1.7.5
- v1.5
- v1.6
- v1.7
- 历史：版本更新记录（2.x）
- 2.0.1-Alpha
- 2.0.5
- 2.0.9
- 1.9.21
- 2.0.10
- 2.0.11
- 2.0.12
- 2.0.13
- 2.1.1
- 2.1.2
- 2.2.0
- 3.0.0
- 历史：版本更新记录（4.x）
- 4.0.3
- 4.0.2
- 4.0.4
- 4.1.1
- 4.1.2
- 4.2.1
- 4.2.2
- 4.2.3
- 4.2.4
- 4.2.5
- 4.2.6
- 4.2.7
- 4.2.9
- 4.2.8
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