HTTP persistent connection
In HTTP persistent connection, or HTTP keep-alive, a single TCP/IP connection is used for multiple requests or responses. It has a huge performance improvement over the normal connection as it uses only a single connection instead of opening and closing connections for each and every single request or response. Some of the benefits of the HTTP keep-alive are as follows:
The load on the CPU and memory is reduced because fewer TCP connections are opened at a time, and no new connections are opened for subsequent requests and responses as these TCP connections are used for them.
Reduces latency in subsequent requests after the TCP connection is established. When a TCP connection is to be established, a three-way handshake communication is made between a user and the HTTP server. After successfully handshaking, a TCP connection is established. In case of keep-alive, the handshaking is performed only once for the initial request to establish a TCP connection, and no handshaking...
