kv109/rails-rendering-collections.md

## rails-rendering-collections.md

      
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              rails-rendering-collections.md
            
          
    I've have ever seen something like this:
Rendered _option.html.erb (1.3ms)
Rendered _option.html.erb (0.9ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (1.2ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.9ms)
Rendered _option.html.erb (1.3ms)
Rendered _option.html.erb (1.0ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.6ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.9ms)
Rendered _option.html.erb (1.1ms)
# Many hidden
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.9ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.9ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.7ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (0.8ms)
Rendered _option.html.erb (1.0ms)
Rendered _option.html.erb (1.1ms)
Rendered _option.html.erb (1.0ms)
Rendered _option_list.html.erb (327.5ms)

then you're doing it wrong. Use :collection option for rendering collections. Instead of
# WRONG WRONG WRONG
<% @options.each do |option| %>
  <%= render partial: 'option', locals: { option: option } %>
<% end %>
do
# GOOD GOOD GOOD
<%= render partial: 'option', collection: @options %>
and you'll get nicer logs with smaller ms numbers:
Rendered _options_summary_cell.html.erb (118.0ms)
Rendered _option_list.html.erb (126.7ms)