The python debugger is extremely slow

[FuZhiyu]

• VSCode Version: Code 1.11.2 (6eaebe3, 2017-04-13T07:56:42.517Z)
• OS Version: Darwin x64 16.5.0
• Extensions:

Extension	Author	Version
project-manager	alefragnani	0.14.0
gitignore	codezombiech	0.5.0
git-extension-pack	donjayamanne	0.1.2
githistory	donjayamanne	0.2.0
python	donjayamanne	0.6.2
gitlens	eamodio	3.4.5
sublime-keybindings	ms-vscode	2.0.1
vscode-open-in-github	ziyasal	1.2.3

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Steps to Reproduce:

1. run the VSC debugger;
2. run the file in the console;
3. compare the speed.

Running in the VSC debugger is much slower than running it outside.

[mjbvz]

This issue was moved to DonJayamanne/pythonVSCode#897