Add -p to --help CLI output

src/vs/code/node/argv.ts

@@ -83,6 +83,7 @@ export const optionsHelp: { [name: string]: string; } = {
 	'-g, --goto': localize('goto', "Open the file at path at the line and column (add :line[:column] to path)."),
 	'--locale <locale>': localize('locale', "The locale to use (e.g. en-US or zh-TW)."),
 	'-n, --new-window': localize('newWindow', "Force a new instance of Code."),
+	'-p, --performance': localize('performance', "Start with the 'Developer: Startup Performance' command enabled."),
 	'-r, --reuse-window': localize('reuseWindow', "Force opening a file or folder in the last active window."),
 	'--user-data-dir <dir>': localize('userDataDir', "Specifies the directory that user data is kept in, useful when running as root."),
 	'--verbose': localize('verbose', "Print verbose output (implies --wait)."),