ResourceManager.GetString() Vs SPUtility.GetLocalizedString() in sharePoint.

In a sharePoint application we can retrieve resource file data from two methods.

1. ResourceManager.GetString(): Which is the API provided by .Net.

2.SPUtility.GetLocalizedString():This method is provided by the sharePoint API in Microsoft.SharePoint.Utilities.

To test the performance of these two methods-

1. First we created a visual web part and put two labels in it.

2.Then we fetched 1,000 strings from same resource file using both methods and found that SPUtility.GetLocalizedString() method  is five times faster than ResourceManager.GetString() method.

After de-compiling the assemblies, i found one interesting thing that  SPUtility.GetLocalizedString() method cached the whole resource file and each time when we have query via SPUtility.GetLocalizedString() method , it will return localized data from cache.

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