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What's New in ASP.NET Web Pages 3.2.1 Beta

By Microsoft ASP.NET Team|

The NuGet packages for ASP.NET Web Pages 3.2.1 beta are now live on the NuGet gallery!

Download this release

You can install or update the NuGet package for ASP.NET Web Pages 3.2.1 Beta using the NuGet Package Manager Console, with the following command:

  • Install-Package Microsoft.AspNet.WebPages -Version 3.2.1-Beta –Pre

Prerequisites for this release

What’s in this release?

This release provides a significant performance improvement in rendering large razor pages. See Codeplex Issue 585.

We worked with the MSN team on rendering large pages. When pages render over 80 Kilobytes of data, we end up with objects on the large object heap. When multiple layers of layouts are used this effect can be multiplied.

The result on the server is extra CPU usage, longer retention of memory, and even long pauses during Gen 2 cleanup in the garbage collector.

Below is a table demonstrating the results of analyzing a perfview for a run. The CPU is held constant at about 68%, while large pages are being rendered. The table shows that the number of Generation 2 collections has been almost completely eliminated, and the result is higher request rate and a considerable reduction in pauses due to garbage collection.

Area Before (3.2) After (3.2.1) Delta %
Total request (count) 26,986 32,591 20.80%
Trace duration (seconds) 196.20 198.60 1.20%
Request/second 137.53 164.10 19.30%
 CPU Load 68.80% 68.50%   -0.40%
GC CPU Samples 124,323 17,543 -85.90%
Total allocations (count) 55,357,146 57,222,949 3.40%
Total GC Pause (samples) 15,091 8,515 -43.60%
Gen0 GC (count) 403 1,216 201.70%
Gen1 GC (count) 290 367 26.60%
Gen2 GC (count) 229 2 -99.10%
CPU / request (samples/req) 19.73 16.47 -16.50%

Color coding: Core Improvement Positive impact on performance

Questions and feedback

You can submit questions related to this release on the ASP.NET forums (MVC, Web API, Web Pages).Please submit any issues you encounter and feature suggestions for future releases on our CodePlex site.

Thanks and enjoy!

This article was originally created on July 25, 2014

Author Information

Microsoft ASP.NET Team

Microsoft ASP.NET Team – ASP.NET is a free web framework for building great Web sites and Web applications using HTML, CSS and JavaScript.