c# - GZIP in .net core not working -

i'm attempting add gzip middleware asp.net core app.

i have added following package :

"microsoft.aspnetcore.responsecompression": "1.0.0"

in startup.cs configure services method have following :

public void configureservices(iservicecollection services) {     services.configure<gzipcompressionprovideroptions>(options => options.level = compressionlevel.fastest);     services.addresponsecompression(options =>     {         options.providers.add<gzipcompressionprovider>();     });      services.addmvc(); } 

in configure method have following :

public void configure(iapplicationbuilder app, ihostingenvironment env, iloggerfactory loggerfactory) {     loggerfactory.addconsole(configuration.getsection("logging"));     loggerfactory.adddebug();      app.useresponsecompression();     app.usemvc(); } 

however when try , load page, doesn't come through gzip compressed. have used both string response , outputting view. response headers in chrome :

i on windows machine developing in visual studio. when running app have tried running visual studio (via f5), , using "dotnet run" command command line. neither output gzip compression.

by placing useresponsecompression twice under each other managed make work. have no idea how made work. still looking accepted solution.