Benchmark sprockets-rails javascript_include_tag cache

test_railtie.rb

# sprockets-rails/test/test_railtie.rb

def test_benchmark_assets_tag
  app.configure do
    config.assets.paths << FIXTURES_PATH
    config.assets.precompile += ["bar.js", "bar.css"]
  end
  app.initialize!
  
  require 'benchmark/ips'
  @monkey = ActionView::Base.new
  
  # puts @monkey.javascript_include_tag("bar.js", "foo.js", title: "foo")
  # puts @mock.stylesheet_link_tag("style.css", "theme.css", media: "all")
  # exit
  puts "\n\n"
  ActionView::Resolver.caching = false
  @monkey.javascript_include_tag("bar.js")
  @monkey.stylesheet_link_tag("bar.css")
  t1 = Time.now
  @monkey.javascript_include_tag("bar.js")
  @monkey.stylesheet_link_tag("bar.css")
  puts "without cache = #{(Time.now - t1) * 1000}"

  ActionView::Resolver.caching = true
  # warmup
  @monkey.javascript_include_tag("bar.js")
  @monkey.stylesheet_link_tag("bar.css")
  t2 = Time.now
  @monkey.javascript_include_tag("bar.js")
  @monkey.stylesheet_link_tag("bar.css")
  puts "cache = #{(Time.now - t2) * 1000}"

  # exit

  Benchmark.ips do |x|
    x.report("javascript_include_tag witout cache") { 
      ActionView::Resolver.caching = false
      @monkey.javascript_include_tag("bar.js")
    }

    x.report("javascript_include_tag with cache") { 
      ActionView::Resolver.caching = true
      @monkey.javascript_include_tag("bar.js")
    }

    x.compare!
  end

  Benchmark.ips do |x|
    x.report("stylesheet_link_tag witout cache") { 
      ActionView::Resolver.caching = false
      @monkey.stylesheet_link_tag("bar.css")
    }

    x.report("stylesheet_link_tag with cache") { 
      ActionView::Resolver.caching = true
      @monkey.stylesheet_link_tag("bar.css")
    }

    x.compare!
  end
end

without cache = 2.104
cache = 0.06899999999999999
Calculating -------------------------------------
javascript_include_tag witout cache
                       261.000  i/100ms
javascript_include_tag with cache
                         1.254k i/100ms
-------------------------------------------------
javascript_include_tag witout cache
                          3.202k (± 6.1%) i/s -     16.182k
javascript_include_tag with cache
                         49.110k (±10.1%) i/s -    242.022k

Comparison:
javascript_include_tag with cache:    49109.6 i/s
javascript_include_tag witout cache:     3202.2 i/s - 15.34x slower

Calculating -------------------------------------
stylesheet_link_tag witout cache
                       264.000  i/100ms
stylesheet_link_tag with cache
                         1.269k i/100ms
-------------------------------------------------
stylesheet_link_tag witout cache
                          3.159k (± 7.9%) i/s -     15.840k
stylesheet_link_tag with cache
                         47.309k (±11.1%) i/s -    233.496k

Comparison:
stylesheet_link_tag with cache:    47308.8 i/s
stylesheet_link_tag witout cache:     3159.1 i/s - 14.98x slower