NET Framework 4.5 new feature (3) 64-bit platform supports arrays larger than 2 GB, framework4.5

NET Framework 4.5 new feature (3) 64-bit platform supports arrays larger than 2 GB, framework4.5

 

The 64-bit platform. NET Framework array cannot exceed 2 GB. This restriction is a big problem for staff who need to use large matrices and vector computing.

 

A System. OutOfMemoryException is often thrown when you use large matrices and vector computing, no matter how large the RAM capacity is, as shown in:

 

 

Reference Program

 class Program    {        private static void Main(string[] args)        {            int arrysize = 150000000;            var large=new decimal[arrysize];            Console.ReadLine();        }    }

 

Fortunately. NET Framework 4.5 introduces a Configuration Attribute in runtime mode, so that the total size of the array is greater than 2 GB 64-bit applications.

You only need to enable the gcAllowVeryLargeObjects element to control the behavior of. NET garbage-collection system.

Reference template

<?xml version="1.0" encoding="utf-8" ?><configuration>    <startup>         <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />    </startup>    <runtime>      <gcAllowVeryLargeObjects enabled="true" />     </runtime></configuration>

You can see that the result does not throw an exception and can run normally, as shown below:

 

This method makes better use of available memory when using a huge array on a 64-bit platform.

You can combine this setting with garbage-collection system to improve it. However, the maximum number of elements in the. NET Framework 4.5 and. NET Framework 4.0 arrays is the same.