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Google.Cloud.Diagnostics.AspNetCore 1.0.0-beta 13 as very high CPU usage

See original GitHub issue

@iantalarico as discussed on slack

 dotnet --info
.NET Command Line Tools (2.0.0-preview2-006497)

Product Information:
 Version:            2.0.0-preview2-006497
 Commit SHA-1 hash:  06a2093335

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.12
 OS Platform: Darwin
 RID:         osx.10.12-x64
 Base Path:   /usr/local/share/dotnet/sdk/2.0.0-preview2-006497/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.0-preview2-25407-01
  Build    : 40c565230930ead58a50719c0ec799df77bddee9

Just starting up the app with one of the following enabled in startup.cs (no need to call a controller or whatever):

           // var tracingQPS = 1000;
           // services.AddGoogleTrace(options =>
            // {
            //     options.ProjectId = Configuration["AppSettings:GoogleProjectID"];
            //     options.TraceFallbackPredicate = TraceDecisionPredicate.Default;
            //     options.Options = TraceOptions.Create(tracingQPS);
            // });

            services.AddGoogleExceptionLogging(options =>
            {
                options.ProjectId = Configuration["AppSettings:GoogleProjectID"];
                options.ServiceName = "API";
                options.Version = "1.0";
            });

The Use*() is commented out but even if it is enabled, issue appears.

Google.Cloud.Diagnostics.AspNetCore 1.0.0-beta 13 -> dotnet goes above 100% CPU. Google.Cloud.Diagnostics.AspNetCore 1.0.0-beta 11 -> dotnet has normal CPU usage.

Also happens with .net core 1.1.

Note: With such high CPU usage, App engine automatically scaled up the number of instances to the default max (20). Projected billing was around 700$ for three days for all our services…