Install without Packagist - magehost/performance-dashboard GitHub Wiki

composer config repositories.packagist false
composer config repositories.magehost_performance-dashboard vcs https://github.com/magehost/performance-dashboard
composer require magehost/performance-dashboard
php bin/magento module:enable MageHost_PerformanceDashboard
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy --area adminhtml
composer config --unset repositories.packagist