Blackfire.io for WP

.blackfire.yml

metrics:
  do_action:
   label: "do_action calls"
   matching_calls:
      php:
      - callee:
          selector: '=do_action'
          argument: { 1: "^" }

  apply_filters:
    label: "apply_filters calls"
    matching_calls:
      php:
      - callee:
          selector: '=apply_filters'
          argument: { 1: "^" }

  apply_filters_wp_hook:
    label: "apply_filters calls wp hook"
    matching_calls:
      php:
      - callee:
          selector: '=WP_Hook::apply_filters'
          argument: { 1: "^" }