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Speed up digests with refinements #417

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wants to merge 2 commits into from
Closed

Speed up digests with refinements #417

wants to merge 2 commits into from

Commits on Nov 4, 2016

  1. Speed up digests with refinements 

    Huge thank you to @bouk who did all the work here.

Running asset generation in a loop on codetriage.com

```
task "assets:bench" do
  measure = []

  50.times do |i|
    puts "== Running (#{i})"
    measure << Benchmark.measure do
      `rm -rf tmp/cache/assets/sprockets/v4.0/ ; rm -rf public/assets; touch tmp; time RAILS_ENV=production bundle exec rake assets:precompile`
    end.real
  end
  puts "================ DONE ================"
  puts measure.join("\n")
end
```

I get these numbers:

```
            Avg         STDev
Refinements 10.06318182 0.2621523045
Hash        12.08513782 1.944694921
```

Based on this refinements is faster than the current hash (8-16% in a real world assets:precompile app), but there is a high variance.
    @schneems
    schneems committed Nov 4, 2016
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  2. Minimum version of Ruby now 2.2

    @schneems
    schneems committed Nov 4, 2016
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