Very slow when view the large-stack-array in debugging program

VSCode Version: Code 1.8.1 (ee428b0, 2016-12-19T14:41:20.664Z)
OS Version: Linux x64 4.4.0-45-generic

Extensions:
Extension Author Version
compulim-vscode-dictionary Compulim 0.0.5
java-debug DSnake 0.0.2
start-git-bash McCarter 1.1.0
code-settings-sync Shan 2.4.2
logcat abhiagr 0.0.6
code-gnu-global austin 0.2.1
GBKtoUTF8 bukas 0.0.2
vscode-javac georgewfraser 0.0.23
CppSnippets hars 0.0.5
vscode-csscomb mrmlnc 4.0.0
PowerShell ms-vscode 0.8.0
cpptools ms-vscode 0.9.3
vscode-icons robertohuertasm 6.0.0
vscode-header-source ryzngard 1.0.4
guides spywhere 0.6.1
java-imports-snippets tushortz 0.0.1
java-snippets tushortz 0.0.1
cmake twxs 0.0.15
vscode-react-native vsmobile 0.2.5
intelligence-change-case zhengxiaoyao0716 1.1.0
vscode-proto3 zxh404 0.0.7
Steps to Reproduce:
example:
int main()
{
char buf[2048] = "";
return 0;
}

1.debug a c/c++ program.
2.define a large stack array(such as 1024, 2048...102400).
3.set break point below the large-stack-array.launch gdb debug mode with vscode.
4.view the large-stack-array content at the Locals area.

Problem: it 's very slowly to view the large-stack-array when debugging program.
Pls help me to check and solve this problem.