Dealing with Large JSON Strings in ASP.NET MVC Views

Large JSON Objects (approximately 1.5 MB) are received in Controller C1. They are then converted to strings and stored in a hidden label in View V1.

The JSON data in V1 is utilized by parsing it in JavaScript J1.

An occurrence of

Out of Memory Exception

has been noticed occasionally on the ASP.NET MVC page.

There is uncertainty about whether the large JSON strings in View V1 could be the cause of this issue.

  1. Could the extensive JSON strings be responsible for the OOM Exception?
  2. Is there a more efficient method to handle the substantial JSON strings in JavaScript J1?
javascriptc#asp.netasp.net-mvcjson

Answer №1

Let's start with a few questions:

  • At what point do you encounter this exception?
  • Is it when you are rendering your View?
  • Could it be when the js is trying to handle a large object in the browser?
  • Or perhaps in the Controller when attempting to retrieve this object?

If you are experiencing this error on the Server side, it might be due to your string object being larger than 85000 bytes, causing it to be moved to the LOH. This means that the object will linger in memory for quite some time until the GC finally frees up space. If you frequently use your controller method, you may run into Out of Memory (OOM) issues. I recommend profiling your application under production conditions and monitoring your memory usage.

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