Prevent app to cause H12 - Request Timeout errors

[zaziemo]

https://devcenter.heroku.com/articles/h12-request-timeout-in-ruby-mri

Find out which processes are slow.

[zaziemo]

mal checken:

A Rack::Timeout::RequestTimeoutException occurred in profiles#index:

 Request waited 28064ms, then ran for longer than 1936ms 
 app/views/shared/_tagbox.html.erb:1:in `_app_views_shared__tagbox_html_erb___4057451778339204059_81720620'


-------------------------------
Request:
-------------------------------

 * URL        : https://speakerinnen-liste.herokuapp.com/de/topics?page=114&topic=home%2Bstudies
 * HTTP Method: GET
 * IP address : 185.191.171.12
 * Parameters : {"page"=>"114", "topic"=>"home+studies", "controller"=>"profiles", "action"=>"index", "locale"=>"de"}
 * Timestamp  : 2021-01-13 18:24:16 UTC
 * Server : 69929568-d8c0-4f9a-a2f6-677f761713e3
 * Rails root : /app
 * Process: 7

A Rack::Timeout::RequestTimeoutException occurred in profiles#index:

 Request waited 28959ms, then ran for longer than 1041ms 
 app/controllers/profiles_controller.rb:40:in `index'


-------------------------------
Request:
-------------------------------

 * URL        : https://www.speakerinnen.org/en/topics?page=5&topic=linux
 * HTTP Method: GET
 * IP address : 216.244.66.249
 * Parameters : {"page"=>"5", "topic"=>"linux", "controller"=>"profiles", "action"=>"index", "locale"=>"en"}
 * Timestamp  : 2021-01-13 18:24:37 UTC
 * Server : 69929568-d8c0-4f9a-a2f6-677f761713e3
 * Rails root : /app
 * Process: 7

A Rack::Timeout::RequestTimeoutException occurred in profiles#index:

Request waited 22912ms, then ran for longer than 7088ms app/views/shared/_tagbox.html.erb:1:in `_app_views_shared__tagbox_html_erb___4057451778339204059_46812640'

---

Request:

• URL : https://speakerinnen-liste.herokuapp.com/de/categories/9?page=5
• HTTP Method: GET
• IP address : 173.231.59.199
• Parameters : {"page"=>"5", "controller"=>"profiles", "action"=>"index", "locale"=>"de", "category_id"=>"9"}
• Timestamp : 2021-01-13 15:42:08 UTC
• Server : 69929568-d8c0-4f9a-a2f6-677f761713e3
• Rails root : /app
• Process: 7

[tyranja]

https://devcenter.heroku.com/articles/ruby-memory-use