vscode: VSCode freezes system when launching from CLI on macOS

• VSCode Version: 1.34.0, 1.35.0-insider
• OS Version: macOS 10.14.5

Steps to Reproduce:

1. Open terminal
2. Run code-insiders --disable-extension --disable-gpu --verbose
3. Throughout the process, the system is completely unusable 1 to 3 times, each last for a few seconds.

Does this issue occur when all extensions are disabled?: Yes

vscode-insider log dump

Launch VSCode from GUI is fine.

~Also, not sure if this is related. I ran ps -ax | grep "Visual Studio Code.app" to check whether there is any hangout process. There is a hangout process in the background even I quit VSCode. The pid changes every time I ran the ps command, so it is impossible to kill the process.~ never mind this, it was just the grep process.

 6812 ttys000    0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn Visual Studio Code.app