Golang debugging is incredibly slow

[cfiderer]

What version of Go, VS Code & VS Code Go extension are you using?

Version Information

• Run go version to get version of Go from the VS Code integrated terminal.

  • $ go version
    go version go1.17.6 windows/amd64

• Run gopls -v version to get version of Gopls from the VS Code integrated terminal.

  • $ gopls version
    golang.org/x/tools/gopls v0.7.5
    golang.org/x/tools/gopls@v0.7.5 h1:8Az52YwcFXTWPvrRomns1C0N+zlgTyyPKWvRazO9GG8=

• Run code -v or code-insiders -v to get version of VS Code or VS Code Insiders.

  • $ code -v
    [0129/161900.904:ERROR:registration_protocol_win.cc(102)] CreateFile: The system cannot find the file specified. (0x2)
    1.63.2
    899d46d82c4c95423fb7e10e68eba52050e30ba3
    x64

• Check your installed extensions to get the version of the VS Code Go extension

  • checked with 0.31.0 (using dlv) and 0.30.0 (using dlv-dap)

• Run Ctrl+Shift+P (Cmd+Shift+P on Mac OS) > Go: Locate Configured Go Tools command.

  • Checking configured tools....
    GOBIN: undefined
    toolsGopath:
    gopath: C:\SAPDevelop\AppData\go
    GOROOT: C:\SAPDevelop\Go
    PATH: C:\Program Files\SapMachine\JDK\11\bin;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH;C:\Program Files\IDM Computer Solutions\UltraEdit;C:\Program Files\Microsoft VS Code\bin;C:\Tools\mingw64\x86_64-8.1.0-win32-sjlj\bin;C:\Tools\SAP;C:\Program Files (x86)\Graphviz2.38\bin;C:\Program Files\Perforce;C:\SAPDevelop\AppData\go\bin;C:\Program Files (x86)\OpenText\Viewer\bin;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\bin;C:\Program Files\PuTTY;C:\Program Files\Amazon\AWSCLIV2;C:\SAPDevelop\Go\bin;C:\Program Files\Git\cmd;C:\Program Files\Docker\Docker\resources\bin;C:\ProgramData\DockerDesktop\version-bin;C:\Users\D041725\AppData\Local\Programs\Python\Python39\Scripts;C:\Users\D041725\AppData\Local\Programs\Python\Python39;C:\Users\D041725\AppData\Local\Microsoft\WindowsApps;C:\SAPDevelop\AppData\go\bin;C:\Users\D041725\AppData\Local\GitHubDesktop\bin;C:\Users\D041725\AppData\Local\Microsoft\WindowsApps;C:\Users\D041725\go\bin

  go: C:\SAPDevelop\Go\bin\go.exe: go version go1.17.6 windows/amd64

  gopkgs: C:\SAPDevelop\AppData\go\bin\gopkgs.exe: go1.17.5
  path github.com/uudashr/gopkgs/v2/cmd/gopkgs
  mod github.com/uudashr/gopkgs/v2 v2.1.2 h1:A0+QH6wqNRHORJnxmqfeuBEsK4nYQ7pgcOHhqpqcrpo=
  dep github.com/karrick/godirwalk v1.12.0 h1:nkS4xxsjiZMvVlazd0mFyiwD4BR9f3m6LXGhM2TUx3Y=
  dep github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=

  go-outline: C:\SAPDevelop\AppData\go\bin\go-outline.exe: go1.17
  path github.com/ramya-rao-a/go-outline
  mod github.com/ramya-rao-a/go-outline v0.0.0-20210608161538-9736a4bde949 h1:iaD+iVf9xGfajsJp+zYrg9Lrk6gMJ6/hZHO4cYq5D5o=
  dep golang.org/x/tools v0.1.1 h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=

  gotests: C:\SAPDevelop\AppData\go\bin\gotests.exe: go1.17.5
  path github.com/cweill/gotests/gotests
  mod github.com/cweill/gotests v1.6.0 h1:KJx+/p4EweijYzqPb4Y/8umDCip1Cv6hEVyOx0mE9W8=
  dep golang.org/x/tools v0.0.0-20191109212701-97ad0ed33101 h1:LCmXVkvpQCDj724eX6irUTPCJP5GelFHxqGSWL2D1R0=

  gomodifytags: C:\SAPDevelop\AppData\go\bin\gomodifytags.exe: go1.17.5
  path github.com/fatih/gomodifytags
  mod github.com/fatih/gomodifytags v1.16.0 h1:B65npXIXSk44F6c1hZGE1NazSnt+eXvtdEOG2Uy+QdU=
  dep github.com/fatih/camelcase v1.0.0 h1:hxNvNX/xYBp0ovncs8WyWZrOrpBNub/JfaMvbURyft8=
  dep github.com/fatih/structtag v1.2.0 h1:/OdNE99OxoI/PqaW/SuSK9uxxT3f/tcSZgon/ssNSx4=
  dep golang.org/x/tools v0.0.0-20180824175216-6c1c5e93cdc1 h1:EAPsk8kfGCjxQagrkWjzXlUWe2p3gj5MknO+z2o9GKc=

  impl: C:\SAPDevelop\AppData\go\bin\impl.exe: go1.17.5
  path github.com/josharian/impl
  mod github.com/josharian/impl v1.1.0 h1:gafhg1OFVMq46ifdkBa8wp4hlGogjktjjA5h/2j4+2k=
  dep golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
  dep golang.org/x/tools v0.0.0-20200522201501-cb1345f3a375 h1:SjQ2+AKWgZLc1xej6WSzL+Dfs5Uyd5xcZH1mGC411IA=
  dep golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=

  goplay: C:\SAPDevelop\AppData\go\bin\goplay.exe: go1.17
  path github.com/haya14busa/goplay/cmd/goplay
  mod github.com/haya14busa/goplay v1.0.0 h1:ED4BMrGQ3WH7H3YXrcnWMVzj1xeSepaYTkLh1DtFi/4=
  dep github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 h1:JIAuq3EEf9cgbU6AtGPK4CTG3Zf6CKMNqf0MHTggAUA=

  dlv: C:\SAPDevelop\AppData\go\bin\dlv.exe: go1.17.6
  path github.com/go-delve/delve/cmd/dlv
  mod github.com/go-delve/delve v1.8.0 h1:uvwPyfr6n2g1S6/bt270lM4fBK76P/3FDCufOsK0CjQ=
  dep github.com/cilium/ebpf v0.7.0 h1:1k/q3ATgxSXRdrmPfH8d7YK0GfqVsEKZAX9dQZvs56k=
  dep github.com/cosiner/argv v0.1.0 h1:BVDiEL32lwHukgJKP87btEPenzrrHUjajs/8yzaqcXg=
  dep github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
  dep github.com/derekparker/trie v0.0.0-20200317170641-1fdf38b7b0e9 h1:G765iDCq7bP5opdrPkXk+4V3yfkgV9iGFuheWZ/X/zY=
  dep github.com/google/go-dap v0.6.0 h1:Y1RHGUtv3R8y6sXq2dtGRMYrFB2hSqyFVws7jucrzX4=
  dep github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
  dep github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
  dep github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
  dep github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
  dep github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
  dep github.com/mattn/go-runewidth v0.0.3 h1:a+kO+98RDGEfo6asOGMmpodZq4FNtnGP54yps8BzLR4=
  dep github.com/peterh/liner v1.2.1 h1:O4BlKaq/LWu6VRWmol4ByWfzx6MfXc5Op5HETyIy5yg=
  dep github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
  dep github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
  dep github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
  dep github.com/spf13/cobra v1.1.3 h1:xghbfqPkxzxP3C/f3n5DdpAbdKLj4ZE4BWQI362l53M=
  dep github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
  dep go.starlark.net v0.0.0-20200821142938-949cc6f4b097 h1:YiRMXXgG+Pg26t1fjq+iAjaauKWMC9cmGFrtOEuwDDg=
  dep golang.org/x/arch v0.0.0-20190927153633-4e8777c89be4 h1:QlVATYS7JBoZMVaf+cNjb90WD/beKVHnIxFKT4QaHVI=
  dep golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 h1:id054HUawV2/6IGm2IV8KZQjqtwAOo2CYlOToYqa0d0=
  dep gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=

  dlv-dap: C:\SAPDevelop\AppData\go\bin\dlv-dap.exe: go1.17.6
  path github.com/go-delve/delve/cmd/dlv
  mod github.com/go-delve/delve v1.7.4-0.20211208103735-2f13672765fe h1:p5qH9Bb0yHA4Fy5L+Rp+4jL2ppKxBvYJWHR6YhFeD7k=
  dep github.com/cilium/ebpf v0.7.0 h1:1k/q3ATgxSXRdrmPfH8d7YK0GfqVsEKZAX9dQZvs56k=
  dep github.com/cosiner/argv v0.1.0 h1:BVDiEL32lwHukgJKP87btEPenzrrHUjajs/8yzaqcXg=
  dep github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
  dep github.com/derekparker/trie v0.0.0-20200317170641-1fdf38b7b0e9 h1:G765iDCq7bP5opdrPkXk+4V3yfkgV9iGFuheWZ/X/zY=
  dep github.com/google/go-dap v0.6.0 h1:Y1RHGUtv3R8y6sXq2dtGRMYrFB2hSqyFVws7jucrzX4=
  dep github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
  dep github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
  dep github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
  dep github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRUIY4=
  dep github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
  dep github.com/mattn/go-runewidth v0.0.3 h1:a+kO+98RDGEfo6asOGMmpodZq4FNtnGP54yps8BzLR4=
  dep github.com/peterh/liner v1.2.1 h1:O4BlKaq/LWu6VRWmol4ByWfzx6MfXc5Op5HETyIy5yg=
  dep github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
  dep github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
  dep github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
  dep github.com/spf13/cobra v1.1.3 h1:xghbfqPkxzxP3C/f3n5DdpAbdKLj4ZE4BWQI362l53M=
  dep github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
  dep go.starlark.net v0.0.0-20200821142938-949cc6f4b097 h1:YiRMXXgG+Pg26t1fjq+iAjaauKWMC9cmGFrtOEuwDDg=
  dep golang.org/x/arch v0.0.0-20190927153633-4e8777c89be4 h1:QlVATYS7JBoZMVaf+cNjb90WD/beKVHnIxFKT4QaHVI=
  dep golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 h1:id054HUawV2/6IGm2IV8KZQjqtwAOo2CYlOToYqa0d0=
  dep gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=

  staticcheck: C:\SAPDevelop\AppData\go\bin\staticcheck.exe: go1.17.6
  path honnef.co/go/tools/cmd/staticcheck
  mod honnef.co/go/tools v0.2.2 h1:MNh1AVMyVX23VUHE2O27jm6lNj3vjO5DexS4A1xvnzk=
  dep github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
  dep golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
  dep golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 h1:myAQVi0cGEoqQVR5POX+8RR2mrocKqNN1hmeMqhX27k=
  dep golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
  dep golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=

  gopls: C:\SAPDevelop\AppData\go\bin\gopls.exe: go1.17.6
  path golang.org/x/tools/gopls
  mod golang.org/x/tools/gopls v0.7.5 h1:8Az52YwcFXTWPvrRomns1C0N+zlgTyyPKWvRazO9GG8=
  dep github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
  dep github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
  dep github.com/sergi/go-diff v1.1.0 h1:we8PVUC3FE2uYfodKH/nBHMSetSfHDR6scGdBi+erh0=
  dep golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
  dep golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
  dep golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 h1:id054HUawV2/6IGm2IV8KZQjqtwAOo2CYlOToYqa0d0=
  dep golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
  dep golang.org/x/tools v0.1.9-0.20220114220130-fd7798718afd h1:lTnuArxJC+n54TyvWUPyHhrnGxYvhSi13/aM2Ndr4bs=
  dep golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
  dep honnef.co/go/tools v0.2.1 h1:/EPr//+UMMXwMTkXvCCoaJDq8cpjMO80Ou+L4PDo2mY=
  dep mvdan.cc/gofumpt v0.1.1 h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
  dep mvdan.cc/xurls/v2 v2.3.0 h1:59Olnbt67UKpxF1EwVBopJvkSUBmgtb468E4GVWIZ1I=

go env
Workspace Folder (image-replication-service): c:\SAPDevelop\ghe-sap\edgelm\image-replication-service
set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\SAPDevelop\AppData\go-build
set GOENV=C:\Users\D041725\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=-tags=containers_image_openpgp,containers_image_storage_stub
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\SAPDevelop\AppData\go\pkg\mod
set GONOPROXY=.sap.corp
set GONOSUMDB=.sap.corp
set GOOS=windows
set GOPATH=C:\SAPDevelop\AppData\go
set GOPRIVATE=*.sap.corp
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\SAPDevelop\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=C:\SAPDevelop\AppData\temp
set GOTOOLDIR=C:\SAPDevelop\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.17.6
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=0
set GOMOD=c:\SAPDevelop\ghe-sap\edgelm\image-replication-service\go.mod
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -fmessage-length=0 -fdebug-prefix-map=C:\SAPDevelop\AppData\temp\go-build311033940=/tmp/go-build -gno-record-gcc-switches

Share the Go related settings you have added/edited

Run Preferences: Open Settings (JSON) command to open your settings.json file.
Share all the settings with the go. or ["go"] or gopls prefixes.

   "go.useLanguageServer": true,
    "go.delveConfig": {
        "dlvLoadConfig": {
            "followPointers": true,
            "maxVariableRecurse": 1,
            "maxStringLen": 256,
            "maxArrayValues": 64,
            "maxStructFields": -1
        },
        "apiVersion": 2,
        "showGlobalVariables": true
    },
    "go.toolsManagement.autoUpdate": true,
    "go.coverOnSingleTest": true,
    "go.coverOnSingleTestFile": true,

Describe the bug

A clear and concise description of what the bug.

Debugging is practically no longer possible: When a breakpoint is reached, it takes about 30 seconds until variables are displayed. During this time "Unable to process variables: debuggee is running" is displayed. The first "Step Into (F11)" or a "Step Over (F10)" is then executed, but after that no further keystrokes are processed for another 30-60 seconds.

During these wait times, I see in Process Explorer that the dlv.exe (or dlv-dap.exe) process is generating ~10% CPU load (on an Intel Core i9-9880H CPU @ 2.30GHz, 2304 Mhz, 8 Core(s), 16 Logical Processor(s)).

I have been observing this problem since about Wednesday this week.

A clear and concise description of what you expected to happen.

Responsive behavior (as before): variables are displayed immediately, repetitive key strokes are processed in due time.

Steps to reproduce the behavior:

1. Load a Go project
2. Set some breakpoints
3. Debug the program (F5)
4. Step through the program when a breakpoint is hit.
   Observe that debugging is not responsive anymore.

Screenshots or recordings

If applicable, add screenshots or recordings to help explain your problem.
...

As of now, I cannot assess whether this issue is related to VS Code itself, to the vscode-go extension or to the dlv / dlv-dap program...

[wtask]

Have you running any anti-virus or same tools? Stop them and debug again. I have no problems with debug under Windows with a similar configuration.
... and reinstall Go tools

[hyangah]

@cfiderer Thanks for the report. Given that I couldn't reproduce the issue either, I am guessing something unique in your environment or the program you are debugging triggered the behavior. We need more info to investigate further. Please check what @wtask suggested, and follow the steps here to do the initial troubleshooting and gather more info.

[hyangah]

Please reopen this issue or open a new one when you have a concrete reproducer or, manage to capture logs. Thanks!