[
  {
    "name": "safe",
    "title": "<?php _e('Safe'); ?>",
    "tooltip": "<?php _e('Optimizations that are compatible with most of themes and plugins, but may result in not so high Google\'s PageSpeed Insight scores.'); ?>"
  },
  {
    "name": "compact",
    "title": "<?php _e('Compact'); ?>",
    "tooltip": "<?php _e('Optimizations that require small amount of additional disk space (i.e. disabled image processing, loading of external URLs, etc.).'); ?>"
  },
  {
    "name": "optimal",
    "title": "<?php _e('Optimal'); ?>",
    "tooltip": "<?php _e('Optimizations that are suitable for most of websites.'); ?>"
  },
  {
    "name": "ultra",
    "title": "<?php _e('Ultra'); ?>",
    "tooltip": "<?php _e('Highest level of optimizations (excluding experimental ones).'); ?>"
  },
  {
    "name": "experimental",
    "title": "<?php _e('Experimental'); ?>",
    "tooltip": "<?php _e('All kinds of optimization, including experimental and unstable ones.'); ?>"
  }
]