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eager_vs_lazy_metadata.rb
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eager_vs_lazy_metadata.rb
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require 'benchmark'
# preload rspec since we don't want to benchmark that.
require 'rspec/core'
require 'rspec/mocks'
require 'rspec/expectations'
def run_benchmark(description, *args)
Benchmark.benchmark do |bm|
3.times.each do
bm.report(description) do
pid = fork do
RSpec::Core::Runner.run([
# This file defines 16250 examples at various levels of nesting.
"./benchmarks/eager_vs_lazy_metadata/define_examples.rb",
*args
], StringIO.new, StringIO.new)
exit!
end
# writeme.close
Process.wait(pid)
end
end
end
end
puts "#{RUBY_VERSION} - #{RSpec::Core::Metadata < Hash ? "lazy" : "eager"}"
run_benchmark("progress formatter, all", "-fp")
run_benchmark("documentation formatter, all", "-fd")
run_benchmark("progress formatter, filtering by example", "-fp", "-e", "nested")
run_benchmark("documentation formatter, filtering by example", "-fd", "-e", "nested")
__END__
On 2.1, precomputing metadata appears to be about 15% faster.
2.1.0 - eager
progress formatter, all 0.000000 0.000000 1.690000 ( 1.700527)
progress formatter, all 0.000000 0.000000 1.710000 ( 1.712091)
progress formatter, all 0.000000 0.000000 1.690000 ( 1.694437)
documentation formatter, all 0.000000 0.000000 1.740000 ( 1.752185)
documentation formatter, all 0.000000 0.000000 1.740000 ( 1.743691)
documentation formatter, all 0.000000 0.010000 1.760000 ( 1.752427)
progress formatter, filtering by example 0.000000 0.000000 1.710000 ( 1.712782)
progress formatter, filtering by example 0.000000 0.000000 1.690000 ( 1.695519)
progress formatter, filtering by example 0.000000 0.000000 1.680000 ( 1.688278)
documentation formatter, filtering by example 0.000000 0.000000 1.740000 ( 1.734581)
documentation formatter, filtering by example 0.000000 0.000000 1.720000 ( 1.730275)
documentation formatter, filtering by example 0.000000 0.000000 1.730000 ( 1.729879)
2.1.0 - lazy
progress formatter, all 0.000000 0.010000 2.020000 ( 2.021899)
progress formatter, all 0.000000 0.000000 2.010000 ( 2.013904)
progress formatter, all 0.000000 0.000000 1.990000 ( 2.004857)
documentation formatter, all 0.000000 0.000000 2.120000 ( 2.119586)
documentation formatter, all 0.000000 0.000000 2.120000 ( 2.122598)
documentation formatter, all 0.000000 0.000000 2.110000 ( 2.115573)
progress formatter, filtering by example 0.000000 0.000000 2.080000 ( 2.081120)
progress formatter, filtering by example 0.000000 0.000000 2.050000 ( 2.066418)
progress formatter, filtering by example 0.000000 0.000000 2.090000 ( 2.085655)
documentation formatter, filtering by example 0.000000 0.010000 2.160000 ( 2.166207)
documentation formatter, filtering by example 0.000000 0.000000 2.200000 ( 2.196856)
documentation formatter, filtering by example 0.000000 0.000000 2.170000 ( 2.172799)
On 2.0, precomputing metadata appears to be about 20% faster.
2.0.0 - eager
progress formatter, all 0.000000 0.000000 1.720000 ( 1.730478)
progress formatter, all 0.000000 0.000000 1.710000 ( 1.708679)
progress formatter, all 0.000000 0.000000 1.750000 ( 1.753906)
documentation formatter, all 0.000000 0.000000 1.790000 ( 1.804745)
documentation formatter, all 0.010000 0.010000 1.830000 ( 1.805737)
documentation formatter, all 0.000000 0.000000 1.780000 ( 1.802866)
progress formatter, filtering by example 0.000000 0.000000 1.720000 ( 1.714562)
progress formatter, filtering by example 0.000000 0.000000 1.660000 ( 1.663136)
progress formatter, filtering by example 0.000000 0.000000 1.710000 ( 1.716405)
documentation formatter, filtering by example 0.000000 0.000000 1.760000 ( 1.756188)
documentation formatter, filtering by example 0.000000 0.000000 1.760000 ( 1.779646)
documentation formatter, filtering by example 0.000000 0.010000 1.780000 ( 1.766562)
2.0.0 - lazy
progress formatter, all 0.000000 0.000000 2.140000 ( 2.144684)
progress formatter, all 0.000000 0.000000 2.140000 ( 2.152171)
progress formatter, all 0.000000 0.000000 2.150000 ( 2.156945)
documentation formatter, all 0.000000 0.000000 2.270000 ( 2.276520)
documentation formatter, all 0.000000 0.000000 2.270000 ( 2.271053)
documentation formatter, all 0.000000 0.000000 2.280000 ( 2.274769)
progress formatter, filtering by example 0.000000 0.000000 2.210000 ( 2.222937)
progress formatter, filtering by example 0.000000 0.000000 2.190000 ( 2.195851)
progress formatter, filtering by example 0.000000 0.000000 2.240000 ( 2.251092)
documentation formatter, filtering by example 0.000000 0.010000 2.380000 ( 2.368707)
documentation formatter, filtering by example 0.000000 0.000000 2.390000 ( 2.405561)
documentation formatter, filtering by example 0.000000 0.000000 2.430000 ( 2.422848)
On 1.9.3 it appears to be a wash.
1.9.3 - eager
progress formatter, all 0.000000 0.000000 1.860000 ( 1.862991)
progress formatter, all 0.000000 0.000000 1.930000 ( 1.940352)
progress formatter, all 0.000000 0.010000 1.860000 ( 1.854856)
documentation formatter, all 0.000000 0.000000 1.900000 ( 1.912110)
documentation formatter, all 0.000000 0.000000 2.000000 ( 1.998096)
documentation formatter, all 0.000000 0.000000 1.910000 ( 1.914563)
progress formatter, filtering by example 0.000000 0.000000 1.800000 ( 1.800767)
progress formatter, filtering by example 0.000000 0.000000 1.900000 ( 1.918205)
progress formatter, filtering by example 0.000000 0.000000 1.830000 ( 1.824907)
documentation formatter, filtering by example 0.000000 0.000000 1.850000 ( 1.855187)
documentation formatter, filtering by example 0.000000 0.000000 1.940000 ( 1.945985)
documentation formatter, filtering by example 0.000000 0.010000 1.880000 ( 1.879237)
1.9.3 - lazy
progress formatter, all 0.000000 0.000000 1.950000 ( 1.953861)
progress formatter, all 0.000000 0.000000 1.840000 ( 1.848092)
progress formatter, all 0.000000 0.000000 1.920000 ( 1.930265)
documentation formatter, all 0.000000 0.000000 1.920000 ( 1.922012)
documentation formatter, all 0.000000 0.000000 2.010000 ( 2.012511)
documentation formatter, all 0.000000 0.000000 1.920000 ( 1.921090)
progress formatter, filtering by example 0.000000 0.010000 1.990000 ( 1.986591)
progress formatter, filtering by example 0.000000 0.000000 1.990000 ( 1.986991)
progress formatter, filtering by example 0.000000 0.000000 1.990000 ( 1.991256)
documentation formatter, filtering by example 0.000000 0.000000 2.070000 ( 2.080637)
documentation formatter, filtering by example 0.000000 0.000000 2.030000 ( 2.041768)
documentation formatter, filtering by example 0.000000 0.000000 1.970000 ( 1.974151)