forked from OpenNeo/impress
Move item_link partial caching to a helper rather than the template itself
This is a surprisingly huge performance gain. On my testing (with cache_classes set to true to also cache templates), this sped up closet_hangers#index rendering by a factor of 2 when there were a significant number of items. Cool beans. I think we can even hold off on the individual hanger caching now: we've made the closet hanger partial tons faster by moving forms out of them and doing this cache check earlier. I'm expecting significant performance gains both here and on items#index (though less so there). I'll deploy and see how much it helps in production; if not enough, we can look at the layered caching of hangers, lists, groups, full pages, etc. So glad we don't *have* to move to a pagination model!
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4 changed files with 23 additions and 7 deletions
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@ -120,6 +120,23 @@ module ItemsHelper
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" (×#{count})".html_safe if count > 1
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end
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def render_item_link(item)
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# I've discovered that checking the cache *before* attempting to render the
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# partial is significantly faster: moving the cache line out here instead
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# of having it wrap the partial's content speeds up closet_hangers#index
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# rendering time by about a factor of 2. It's uglier, but this call happens
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# a lot, so the performance gain is definitely worth it. I'd be interested
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# in a more legit partial caching abstraction, but, for now, this will do.
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# Because this is a returned-string helper, but uses a buffer-output
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# helper, we have to do some indirection. Fake that the render is in a
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# template, then capture the resulting buffer output.
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capture do
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localized_cache("items/#{item.id}#item_link_partial") do
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safe_concat render(partial: 'items/item_link', locals: {item: item})
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end
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end
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end
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private
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def build_on_pet_types(species, special_color=nil, &block)
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@ -1,4 +1,4 @@
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%div{'class' => closet_hanger_partial_class(closet_hanger), 'data-item-id' => closet_hanger.item_id, 'data-quantity' => closet_hanger.quantity, 'data-id' => closet_hanger.id}
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= render :partial => 'items/item_link', :locals => {:item => closet_hanger.item}
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= render_item_link(closet_hanger.item)
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.quantity{:class => "quantity-#{closet_hanger.quantity}"}
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%span= closet_hanger.quantity
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@ -1,3 +1,3 @@
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.object
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= render :partial => 'items/item_link', :locals => {:item => item}
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= render_item_link(item)
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= closeted_icons_for(item)
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@ -1,5 +1,4 @@
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- localized_cache "items/#{item.id}#item_link_partial" do
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= link_to item_path(item) do
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= image_tag item.thumbnail_url, :alt => item.description, :title => item.description
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%span.name= item.name
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= nc_icon_for(item)
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= link_to item_path(item) do
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= image_tag item.thumbnail_url, :alt => item.description, :title => item.description
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%span.name= item.name
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= nc_icon_for(item)
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