c_cpp_properties.json
{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**"
],
"forcedInclude": [
"${workspaceFolder}/ebpf/ebpf.c"
],
"compilerPath": "/usr/bin/clang",
"cStandard": "c17",
"cppStandard": "c++17",
"intelliSenseMode": "linux-clang-x64",
"configurationProvider": "ms-vscode.makefile-tools",
"defines": [
"_GNU_SOURCE"
]
}
],
"version": 4
}
C/C++: Log Diagnostics
-------- Diagnostics - 2/24/2026, 12:55:31 PM
Version: 1.30.5
Current Configuration:
{
"name": "Linux",
"includePath": [
"/home/kuro/Repositio/udpgrm/**"
],
"forcedInclude": [
"/home/kuro/Repositio/udpgrm/ebpf/ebpf.c"
],
"compilerPath": "/usr/bin/clang",
"cStandard": "c17",
"cppStandard": "c++17",
"intelliSenseMode": "linux-clang-x64",
"configurationProvider": "ms-vscode.makefile-tools",
"defines": [
"_GNU_SOURCE"
],
"compilerPathIsExplicit": true,
"cStandardIsExplicit": true,
"cppStandardIsExplicit": true,
"intelliSenseModeIsExplicit": true,
"recursiveIncludesReduceIsExplicit": false,
"recursiveIncludesPriorityIsExplicit": false,
"recursiveIncludesOrderIsExplicit": false,
"compilerPathInCppPropertiesJson": "/usr/bin/clang",
"configurationProviderInCppPropertiesJson": "ms-vscode.makefile-tools",
"mergeConfigurations": false,
"recursiveIncludes": {},
"browse": {
"limitSymbolsToIncludedHeaders": true
}
}
Modified Settings:
{
"C_Cpp.clang_format_fallbackStyle": "Google",
"C_Cpp.clang_format_sortIncludes": false,
"C_Cpp.loggingLevel": "Debug"
}
Additional Tracked Settings:
{
"editorTabSize": 4,
"editorInsertSpaces": true,
"editorAutoClosingBrackets": "never",
"filesEncoding": "utf8",
"filesAssociations": {
"*.conf": "properties"
},
"filesExclude": {
"**/.git": true,
"**/.svn": true,
"**/.hg": true,
"**/.DS_Store": true,
"**/Thumbs.db": true
},
"filesAutoSaveAfterDelay": false,
"editorInlayHintsEnabled": true,
"editorParameterHintsEnabled": true,
"searchExclude": {
"**/node_modules": true,
"**/bower_components": true,
"**/*.code-search": true
},
"workbenchSettingsEditor": "ui"
}
Custom browse configuration:
{
"browsePath": [
"/home/kuro/Repositio/udpgrm/arch/x86_64/include",
"/home/kuro/Repositio/udpgrm/ebpf",
"/home/kuro/Repositio/udpgrm/src",
"/home/kuro/Repositio/udpgrm/tools"
],
"compilerPath": "/usr/bin/clang-19",
"windowsSdkVersion": "",
"compilerArgsLegacy": [
"-target",
"x86_64-pc-linux-gnu",
"-g",
"-O2",
"-Wall",
"-Wextra",
"-fno-omit-frame-pointer",
"-lsystemd",
"-o",
"mmdecoy"
]
}
cpptools version (native): 1.30.5.0
Current database path: /home/kuro/.cache/vscode-cpptools/c2e7ec820f6d20de55621c9b04709ee1/.browse.VC.db
Translation Unit Mappings:
[ /home/kuro/Repositio/udpgrm/ebpf/ebpf.c - source TU]:
/home/kuro/Repositio/udpgrm/include/udpgrm.h
Translation Unit Configurations:
[ /home/kuro/Repositio/udpgrm/ebpf/ebpf.c ]
Process ID: 23158
Memory Usage: 35 MB
Compiler Path: /usr/bin/clang-19
Include paths:
include: /home/kuro/Repositio/udpgrm/arch/x86_64/include
system include: /usr/local/include
system include: /usr/lib/llvm-19/lib/clang/19/include
system include: /usr/include
Standard Version: c17
IntelliSense Mode: linux-clang-x64
Other Flags:
--clang
--clang_version=190107
Total Memory Usage: 35 MB
------- Workspace parsing diagnostics -------
Number of files discovered (not excluded): 29594
the language server logging
Populating file name cache...
LSP: Sending response (id: 19)
Done populating filename cache. Elapsed time: 26 ms
LSP: Sending response (id: 20)
LSP: (received) textDocument/didClose: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (invoked) textDocument/didClose: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (received) textDocument/didOpen: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) textDocument/didOpen: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (received) cpptools/getCodeActions: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 21)
LSP: (invoked) cpptools/didChangeVisibleTextEditors
Intellisense update pending for: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (invoked) cpptools/getCodeActions: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 21)
LSP: Sending response (id: 21)
IntelliSense update scheduled and TU acquisition started for: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h
LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 22)
LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 22)
LSP: Sending response (id: 22)
Update IntelliSense time (sec): 0.014
LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 23)
LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 23)
LSP: Sending response (id: 23)
LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 24)
LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 24)
LSP: Sending response (id: 24)
Environment
Bug Summary and Steps to Reproduce
Bug Summary:
The whole UI is laggy after click anywhere in an opened C file or terminal, feels like the frontend is blocked by the cpptools. Disabling the cpptools or open a workspace without C/C++ files make the lag go away.
My guess is the LSP communication is causing the problem.
Steps to reproduce:
Expected behavior:
Work without lag.
Configuration and Logs
c_cpp_properties.json { "configurations": [ { "name": "Linux", "includePath": [ "${workspaceFolder}/**" ], "forcedInclude": [ "${workspaceFolder}/ebpf/ebpf.c" ], "compilerPath": "/usr/bin/clang", "cStandard": "c17", "cppStandard": "c++17", "intelliSenseMode": "linux-clang-x64", "configurationProvider": "ms-vscode.makefile-tools", "defines": [ "_GNU_SOURCE" ] } ], "version": 4 } C/C++: Log Diagnostics -------- Diagnostics - 2/24/2026, 12:55:31 PM Version: 1.30.5 Current Configuration: { "name": "Linux", "includePath": [ "/home/kuro/Repositio/udpgrm/**" ], "forcedInclude": [ "/home/kuro/Repositio/udpgrm/ebpf/ebpf.c" ], "compilerPath": "/usr/bin/clang", "cStandard": "c17", "cppStandard": "c++17", "intelliSenseMode": "linux-clang-x64", "configurationProvider": "ms-vscode.makefile-tools", "defines": [ "_GNU_SOURCE" ], "compilerPathIsExplicit": true, "cStandardIsExplicit": true, "cppStandardIsExplicit": true, "intelliSenseModeIsExplicit": true, "recursiveIncludesReduceIsExplicit": false, "recursiveIncludesPriorityIsExplicit": false, "recursiveIncludesOrderIsExplicit": false, "compilerPathInCppPropertiesJson": "/usr/bin/clang", "configurationProviderInCppPropertiesJson": "ms-vscode.makefile-tools", "mergeConfigurations": false, "recursiveIncludes": {}, "browse": { "limitSymbolsToIncludedHeaders": true } } Modified Settings: { "C_Cpp.clang_format_fallbackStyle": "Google", "C_Cpp.clang_format_sortIncludes": false, "C_Cpp.loggingLevel": "Debug" } Additional Tracked Settings: { "editorTabSize": 4, "editorInsertSpaces": true, "editorAutoClosingBrackets": "never", "filesEncoding": "utf8", "filesAssociations": { "*.conf": "properties" }, "filesExclude": { "**/.git": true, "**/.svn": true, "**/.hg": true, "**/.DS_Store": true, "**/Thumbs.db": true }, "filesAutoSaveAfterDelay": false, "editorInlayHintsEnabled": true, "editorParameterHintsEnabled": true, "searchExclude": { "**/node_modules": true, "**/bower_components": true, "**/*.code-search": true }, "workbenchSettingsEditor": "ui" } Custom browse configuration: { "browsePath": [ "/home/kuro/Repositio/udpgrm/arch/x86_64/include", "/home/kuro/Repositio/udpgrm/ebpf", "/home/kuro/Repositio/udpgrm/src", "/home/kuro/Repositio/udpgrm/tools" ], "compilerPath": "/usr/bin/clang-19", "windowsSdkVersion": "", "compilerArgsLegacy": [ "-target", "x86_64-pc-linux-gnu", "-g", "-O2", "-Wall", "-Wextra", "-fno-omit-frame-pointer", "-lsystemd", "-o", "mmdecoy" ] } cpptools version (native): 1.30.5.0 Current database path: /home/kuro/.cache/vscode-cpptools/c2e7ec820f6d20de55621c9b04709ee1/.browse.VC.db Translation Unit Mappings: [ /home/kuro/Repositio/udpgrm/ebpf/ebpf.c - source TU]: /home/kuro/Repositio/udpgrm/include/udpgrm.h Translation Unit Configurations: [ /home/kuro/Repositio/udpgrm/ebpf/ebpf.c ] Process ID: 23158 Memory Usage: 35 MB Compiler Path: /usr/bin/clang-19 Include paths: include: /home/kuro/Repositio/udpgrm/arch/x86_64/include system include: /usr/local/include system include: /usr/lib/llvm-19/lib/clang/19/include system include: /usr/include Standard Version: c17 IntelliSense Mode: linux-clang-x64 Other Flags: --clang --clang_version=190107 Total Memory Usage: 35 MB ------- Workspace parsing diagnostics ------- Number of files discovered (not excluded): 29594 the language server logging Populating file name cache... LSP: Sending response (id: 19) Done populating filename cache. Elapsed time: 26 ms LSP: Sending response (id: 20) LSP: (received) textDocument/didClose: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (invoked) textDocument/didClose: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (received) textDocument/didOpen: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (received) cpptools/didChangeVisibleTextEditors LSP: (invoked) textDocument/didOpen: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (received) cpptools/getCodeActions: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 21) LSP: (invoked) cpptools/didChangeVisibleTextEditors Intellisense update pending for: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (invoked) cpptools/getCodeActions: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 21) LSP: Sending response (id: 21) IntelliSense update scheduled and TU acquisition started for: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 22) LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 22) LSP: Sending response (id: 22) Update IntelliSense time (sec): 0.014 LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 23) LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 23) LSP: Sending response (id: 23) LSP: (received) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 24) LSP: (invoked) cpptools/getFoldingRanges: file:///home/kuro/Repositio/udpgrm/include/udpgrm.h (id: 24) LSP: Sending response (id: 24)Other Extensions
No response
Additional context
No response