Debugger: takes a long time to start and populate the locals window for the first time

[qian6]

Environment data

dotnet --info output:
VS Code version: 1.7.1
C# Extension version: v.1.5.0-beta7
.NET Core version: 1.0.0-SDK Preview4

Steps to reproduce

1. Open hwapp folder in attachments directly
2. Set a breakpoint at line of 10 in Program.cs file
3. Press F5 to start debugging

Expected behavior

It should display immediately variables value in local window

Actual behavior

After it hit breakpoint ,and it display variables value more than 6 seconds in local window
hwapp.zip

[gregg-miskelly]

@qian6 What OS are you using? If you are on Windows, can you save a perf trace with PerfView (be sure to check the checkbox for thread time)

[qian6]

Windows OS have this issue。

[qian6]

Thanks for your help.
Follow your steps, I get a perf trace, and hoping to help you analyze this issue.
Because of the size of file too big ,I will stored in this path\vsdbgqa\CTIResources\VSDiag\Private\Qian

[rajkumar42]

Thanks for the perf trace @qian6 . We identified the slowness is attributed to jitting. We have a work item in for publishing precompiled NI images to improve perf.