Added info about missing menu option (#8318)

* Added info about missing menu option

you need 4.7.1. or up. as found in the blog post.

* Updates

* Update optimize-build-perf.md
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JP Hellemons 2018-08-29 22:00:20 +02:00 committed by Rick Anderson
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--- ---
uid: visual-studio/overview/2017/optimize-build-perf uid: visual-studio/overview/2017/optimize-build-perf
title: Optimize build performance for solution title: Optimize build performance for solution
author: tfitzmac author: AngelosP
description: Optimize build performance for solution description: Optimize build performance for solution
ms.author: riande ms.author: riande
ms.date: 08/22/2018 ms.date: 08/29/2018
msc.type: authoredcontent msc.type: authoredcontent
--- ---
# Optimize build performance for solution # Optimize build performance for solution
Visual Studio 2017 15.8 and later added a new menu item under **Build > ASP.NET Compilation > Optimize Build Performance for Solution**.
![screenshot of the new menu item](optimize-build-perf/_static/optimize-build-performance-for-solution.png) Visual Studio 2017 15.8 or later include a menu item: **Build** > **ASP.NET Compilation** > **Optimize Build Performance for Solution**.
ASP.NET compiles its views at runtime, which means your ASP.NET project carries with it a copy of the compiler. However, on a developer machine when the copy of the compiler doesn't match Visual Studio's copy, your build performance is impacted on the order of 1-3 seconds per incremental build. This feature will update your project's copy of the compiler to match Visual Studio's which should speed up incremental builds. ![Screenshot of the new menu item](optimize-build-perf/_static/optimize-build-performance-for-solution.png)
This is applicable to ASP.NET Framework projects only, it does not apply to ASP.NET Core. ASP.NET compiles its views at runtime, which means that an ASP.NET project carries with it a copy of the compiler. However on a developer machine when the copy of the compiler doesn't match Visual Studio's copy, build performance is impacted on the order of 1-3 seconds per incremental build. This feature updates your project's copy of the compiler to match Visual Studio's, which usually speeds up incremental builds.
**This is applicable to ASP.NET Framework 4.7.1 or later projects only, it does not apply to ASP.NET Core.**