What is the best way to manage the rate of $http requests in angularjs?

Currently, I am in the process of creating a user interface for a data importer using angularjs. The angular application will be processing the input data from a spreadsheet or another source and making GETs/POSTs to an API to manage records on the server and fetch updates.

When dealing with a large number of records being imported, opening up numerous ajax calls simultaneously may not be the most efficient approach. It's unlikely that Angular would be able to process all requests before the first one completes. To address this, I am considering implementing a connection pool to limit the number of ajax calls to a certain amount, such as 10 or 50 at a time.

Is there an existing feature in angular that allows for the throttling of ajax calls? While I am confident I could develop one myself, I would prefer not to reinvent the wheel if there is a more efficient solution available. Are there any recommended tools or plugins for this specific task? I am aware of some options for jquery, but I would like to minimize the use of jquery in this project if possible.

javascriptajaxangularjs

Answer №1

Upon further investigation, I discovered that browsers automatically limit the number of concurrent HTTP requests to the same server to somewhere between 6 and 13, as detailed in this source and this page. Any additional requests are queued until previous ones complete, so it seems like there is no need for any intervention on my part.

I also explored the option of using angular-http-throttler as suggested by nathancahill, but it seemed redundant as browsers already handle throttling. Moreover, it lacked error-handling mechanisms, which could lead to a perpetual queue jam in case of server failures or bad requests.

Having too many requests queued up by the browser simultaneously could potentially cause memory and performance issues, especially with large datasets. While researching solutions to create a fixed-length queue in JavaScript with callback capabilities, I found it challenging due to the non-blocking nature of JavaScript. Hopefully, the browser's built-in throttling will suffice for my needs without requiring me to implement a complex queue system.

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