Should I Create a New HttpClient for Every WebAPI Call, or Reuse a Single Instance?

Webapi client: Each call creates a new httpclient or a reuse single?

Efficient client-server communication is essential for modern web applications. One of the key factor is the life cycle management of HTTPClient for issuing HTTP requests. This article discusses the expenses brought about by creating a new HTTPClient for each call in the Webapi client, and discuss the benefits of reusing a single HTTPClient instance.

Create the overhead of creating a new httpclient

HTTPClient class (introduced in .NET 4.5) aimed at handling HTTP requests efficiently and securely. However, creating a new HTTPClient object will generate a certain amount of overhead:

Set the initialization value:

HTTPClient has attributes such as BaseAddress and DefaultRequestHeaders, which need to be explicitly set after the structure. Create a new instance for each request requires resetting these values, which may be inefficient.

Treatment program initialization:
• HTTPClientHandler inside the httpclient to manage HTTP communication. Creating a new HTTPClient involves initialized new HTTPClientHandler, which may include setting credentials, cookies, and other processing program options. TCP/IP Connection Management:
HTTPClientHandler manages TCP/IP connection in the pool. The release of HTTPClient will also release its httpclientHandler and force the closure of the pool -based TCP/IP connection. Creating a new HTTPClient for each request requires re -establishment of new connections, which will affect performance.
• The benefits of reusing a single HTTPClient
• Although there are expenses, the HTTPClient class aims to be used for multiple calls, or even across threads. Reuse a single HTTPCLIENT instance has a significant advantage:

Optimized header and settings:

By reusing HTTPClient, you can save the work that initialize the header and settings for each request. This improves efficiency, especially when the header and settings are kept between the request. Processing program efficiency:

can add httpmessagehandlers to the request/response pipeline to handle cross -sectional attention points such as log records, review and cache. Reuse HTTPClient allows these processing programs to be initialized only once and used for multiple requests, thereby eliminating the setting of their expenses on each request.

Connecting pool:

Reuse HTTPClient can keep the TCP/IP connection in the pond managed by the ServicepointManager managed in the open state. This reduces the overhead for the subsequent request, thereby improving performance.
• Conclusion
• In the Webapi client, multiple calls for multiple calls for a single HTTPClient instance are usually recommended. Although a small amount of overhead will generate an initial example, the optimized head/settings, processing program efficiency and the benefits of connecting pools exceed these costs. However, the specific performance requirements and network conditions of the application must be considered in order to make a wise decision.

The above is the detailed content of Should I Create a New HttpClient for Every WebAPI Call, or Reuse a Single Instance?. For more information, please follow other related articles on the PHP Chinese website!