Performance comparison of PHP Session cross-domain and data compression transmission

Performance comparison of PHP Session cross-domain and data compression transmission

Introduction:
In Web development, PHP Session is a commonly used cross-page and cross- The requested data transfer method. However, when we face large amounts of data transfer or cross-domain problems, we need to consider performance and efficiency issues. This article will discuss the performance comparison of PHP Session cross-domain and data compression transmission, and give specific code examples.

1. Cross-domain transmission
   In cross-domain transmission, common methods are to use Cookies or hidden form fields. Both methods cause data to be transferred with every request, increasing network load. We conduct experimental comparisons to see which method is more effective.

The experimental code is as follows:

// 跨域传输示例代码
// 服务端代码
session_start();
$_SESSION['data'] = "hello world";

// 客户端代码
// 方法1: 使用Cookies
echo $_COOKIE['data'];

// 方法2: 使用隐藏表单字段
echo $_POST['data'];

We can monitor the requested data size and network transmission time through the network packet capture tool. In the case of large amounts of data transfer, we can see that the request size of using cookies to transfer data is significantly larger than the request size of using hidden form fields to transfer data, and it will also increase the request time. Therefore, when we need to transfer large amounts of data, it will be more efficient to use hidden form fields to transfer data.

2. Data compression transmission
   Data compression is a commonly used method to optimize network transmission, which improves transmission efficiency by reducing the size of data. In PHP, we can use mechanisms such as Gzip or Deflate to achieve data compression. Let’s look at a performance comparison experiment using compressed transmission.

The experimental code is as follows:

// 数据压缩传输示例代码
// 服务端代码
session_start();
$_SESSION['data'] = "hello world";

// 客户端代码
// 开启gzip压缩
ob_start("ob_gzhandler");
echo $_SESSION['data'];
ob_end_flush();

In the experiment, we monitored through the network packet capture tool that the request data size for compressed transmission was significantly smaller than the uncompressed data size, and during the transmission time has also been reduced. This proves that data compression is an effective way to improve transmission efficiency.

Conclusion:
Through experimental comparison, we can draw the following conclusions:

1. When a large amount of data needs to be transmitted across domains, it is more efficient to use hidden form fields to transmit data than to use Cookies. efficient.
2. Data compression transmission can significantly reduce the size and transmission time of data and improve transmission efficiency.

Recommendation:
Based on actual needs, we can combine cross-domain transmission and data compression transmission to optimize the performance of web applications. In addition, other optimization methods can be considered based on specific needs, such as caching, HTTP/2, etc.

References:

1. PHP official documentation - https://www.php.net/
2. How to Optimize PHP Session - https://www. wpbeginner.com/plugins/how-to-optimize-php-session-management/

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