Time between a new issue is opened and a maintainer responds Also called: bug response rate. The maintainer is believed to not “pile on” but try to solve an issue.

Below queries are using users with commit rights, not maintainer.

SELECT avg(time_to_member_comment_in_days) as avg_days_to_member_comment, project_name, url
FROM
(
	SELECT DATEDIFF(earliest_member_comment, issue_created) time_to_member_comment_in_days, project_id, issue_id, project_name, url
	FROM
		(SELECT projects.id as project_id, 
				MIN(issue_comments.created_at) as earliest_member_comment, 
				issues.created_at as issue_created, 
				issues.id as issue_id, projects.name as project_name, url
		FROM msr14.repo_labels
			join projects on repo_labels.repo_id = projects.id
			join issue_labels on issue_labels.label_id = repo_labels.id
			join project_members on projects.id = project_members.repo_id
			join issues on issue_labels.issue_id = issues.id
			join issue_comments on issue_comments.issue_id = issues.id
		where repo_labels.name = 'bug'
			and issue_comments.user_id = project_members.user_id
		group by issues.id) as earliest_member_comments) as time_to_member_comment
group by project_id

SELECT avg(time_to_member_comment_in_days) as avg_days_to_member_comment, project_name, url
FROM
(
	SELECT DATEDIFF(earliest_member_comment, issue_created) time_to_member_comment_in_days, project_id, issue_id, project_name, url
	FROM
		(SELECT projects.id as project_id, 
				MIN(issue_comments.created_at) as earliest_member_comment, 
				issues.created_at as issue_created, 
				issues.id as issue_id, projects.name as project_name, url
		FROM projects
			join project_members on projects.id = project_members.repo_id
			join issues on issues.repo_id = projects.id
			join issue_comments on issue_comments.issue_id = issues.id
		where issue_comments.user_id = project_members.user_id
		group by issues.id) as earliest_member_comments) as time_to_member_comment
group by project_id

  SELECT issues.id                       AS "issue_id", 
         issues.created_at               AS "created_at",
         MIN(issue_comments.created_at)  AS "responded_to"
  FROM issues
  JOIN issue_comments
  ON issue_comments.issue_id = issues.id
  WHERE issue_comments.user_id IN 
       (SELECT users.id
      FROM users
      JOIN commits
      WHERE commits.author_id = users.id
      AND commits.project_id = 78852)
  AND issues.repo_id = 78852
  GROUP BY issues.id

GHData