Sheldon Project – Rendering Optimization – O(n2)

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Sheldon Project – Rendering Optimization – O(n2)

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sheldon-project-demo

Sheldon Project Demo

On Github Thadz / sheldon-project-demo

Sheldon Project

Rendering Optimization

me@somewhere.com June 6th 2013

O(n2)

  @elements.each do |element|
    ...
    @elements.select{...}.each do |child|
      ...
    end
  end

Hash It!

O(n)

  @element_hash.each do |parent, children|
    ...
  end

70%↗

Slow Iteration?

  @elements.each do |element|
    render :partial => "..."
  end

Use Collection

  render :partial => "...", :collection => @elements

20%↗

Fact!

link_to is 3 times slower than raw url

Replace 'em!

40%↗

Performance Comparison

In total,

86%↗

Ajax Call

with loading spinner

Learned

  • Ruby, Rails, logger
  • Javascript, JQuery

Special Thanks

my mentor and everyone in my team

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