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MVC application Optimization


Main points
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1. Enable compression
2. Leverage browser caching
3. Minify CSS and Javascript
4. Minify HTML (GZip compression)
5. Optimize Images
6. Eliminate render-blocking JavaScript and CSS in above-the-fold content
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1. Enable compression HTTP Compression <httpCompression>
compression should be enabled from Windows feature Turn On/Off
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WINDOWS 8 OR WINDOWS 8.1
  1. On the Start screen, move the pointer all the way to the lower left corner, right-click the Start button, and then clickControl Panel.
  2. In Control Panel, click Programs and Features, and then click Turn Windows features on or off.
  3. Expand Internet Information Services, expand World Wide Web Services, expand Performance Features, and then select Dynamic Content Compression and/or Static Content Compression.
  5. Click OK
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2. Leverage browser caching :
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a. Static Compression should be enable in windows IIS
(step of this in above topic “HTTP Compression”)
Web Config setting for this
<staticContent>
<clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="365.00:00:00"/>
</staticContent>
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b. Enable Dynamic Compression in windows IIS
(step of this in above topic “HTTP Compression”)
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Below the screenshot of IIS Setting
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After check on both (static and dynamic) checkbox, click on Apply
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3. Minify CSS and Javascript
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  1. Use bundling in MVC :
    try to make one bundle for page to avoid multiple requests
  2. Remove unused css for particular page (means only required css rule should be on page)
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4. Minify HTML (GZip compression)
Set response header with GZip
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--Add attribute on controller like
    [CompressContent]
public class HomeController : Controller
--Attribute code
public class CompressContentAttribute : ActionFilterAttribute
{
       public override void OnActionExecuting(ActionExecutingContext filterContext)
       {
               GZipEncodePage();
       }

       public static bool IsGZipSupported()
       {
               string AcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"];
               if (!string.IsNullOrEmpty(AcceptEncoding) &&
                       (AcceptEncoding.Contains("gzip") || AcceptEncoding.Contains("deflate")))
                   return true;
               return false;
       }

       public static void GZipEncodePage()
       {
               HttpResponse Response = HttpContext.Current.Response;

               if (IsGZipSupported())
               {
                       string AcceptEncoding = HttpContext.Current.Request.Headers["Accept-Encoding"];
                       if (AcceptEncoding.Contains("gzip"))
                       {
                           Response.Filter = new System.IO.Compression.GZipStream(Response.Filter,
                                               System.IO.Compression.CompressionMode.Compress);
                           Response.AppendHeader("Content-Encoding", "gzip");
                       }
                       else
                       {
                           Response.Filter = new System.IO.Compression.DeflateStream(Response.Filter,
                                               System.IO.Compression.CompressionMode.Compress);
                         Response.AppendHeader("Content-Encoding", "deflate");
                       }
               }
      }
}


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5. Optimize Images
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  1. Try to compress images
  2. Add multiple images into single image to avoid multiple request for each image
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6. Eliminate render-blocking JavaScript and CSS in above-the-fold content
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For parallel rendering add css before javascript
like
<link style….
Then
<script….
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Enable compression (gzip)

MVC4 bundling GZIP and headers
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To properly get the JavaScript files on IIS compressed and served with GZip encoding put the following in your web.config.
<staticContent>
      <remove fileExtension=".js" />
      <mimeMap fileExtension=".js" mimeType="text/javascript" />
      <clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="365.00:00:00" />
 </staticContent>

    <urlCompression doDynamicCompression="true" dynamicCompressionBeforeCache="true" />
    <httpCompression noCompressionForHttp10="false" noCompressionForProxies="false" dynamicCompressionDisableCpuUsage="93" dynamicCompressionEnableCpuUsage="93" staticCompressionDisableCpuUsage="99" staticCompressionEnableCpuUsage="99">
      <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" staticCompressionLevel="9" dynamicCompressionLevel="4" />

    </httpCompression>
</system.webServer>
And then on your ISS in MIME Types
enter image description here
change the application/x-javascript to text/javascript
enter image description here
You will now see in DevTools that JS files are being served with gzip in Content Encoding column.
enter image description here



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<staticContent>
    <clientCache cacheControlCustom="public" cacheControlMode="UseMaxAge" cacheControlMaxAge="365.00:00:00"/>
    </staticContent>

    <urlCompression doDynamicCompression="true" dynamicCompressionBeforeCache="true" />
    <httpCompression noCompressionForHttp10="false" noCompressionForProxies="false" dynamicCompressionDisableCpuUsage="93" dynamicCompressionEnableCpuUsage="93" staticCompressionDisableCpuUsage="99" staticCompressionEnableCpuUsage="99">
     <scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll" staticCompressionLevel="9" dynamicCompressionLevel="4" />
    </httpCompression>
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