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# Usage: ruby spec/benchmarks/caching.rb
# no replacement + many methods _can_ be faster than replacement + many
# methods, but this depends on the values of METHOD_COUNT, OBJECT_COUNT,
# and CALL_COUNT, so tweak them for your own scenario!
require 'benchmark'
require_relative '../../lib/batch_loader'
METHOD_COUNT = 1000 # methods on the object with a large interface
OBJECT_COUNT = 1000 # objects in the batch
CALL_COUNT = 1000 # times a method is called on the loaded object
class ManyMethods
1.upto(METHOD_COUNT) do |i|
define_method("method_#{i}") { i }
end
end
class FewMethods
def method_1
1
end
end
def load_value(x, **opts)
BatchLoader.for(x).batch(opts) do |xs, loader|
xs.each { |x| loader.call(x, x) }
end
end
def benchmark(klass:, **opts)
OBJECT_COUNT.times do
value = load_value(klass.new, opts)
CALL_COUNT.times { value.method_1 }
end
end
Benchmark.bmbm do |x|
x.report('replacement + many methods') { benchmark(klass: ManyMethods) }
x.report('replacement + few methods') { benchmark(klass: FewMethods) }
x.report('no replacement + many methods') { benchmark(klass: ManyMethods, replace_methods: false) }
x.report('no replacement + few methods') { benchmark(klass: FewMethods, replace_methods: false) }
x.report('no cache + many methods') { benchmark(klass: ManyMethods, cache: false, replace_methods: false) }
x.report('no cache + few methods') { benchmark(klass: FewMethods, cache: false, replace_methods: false) }
end
# Rehearsal -----------------------------------------------------------------
# replacement + many methods 2.260000 0.030000 2.290000 ( 2.603038)
# replacement + few methods 0.450000 0.000000 0.450000 ( 0.457151)
# no replacement + many methods 0.440000 0.010000 0.450000 ( 0.454444)
# no replacement + few methods 0.370000 0.000000 0.370000 ( 0.380699)
# no cache + many methods 31.780000 0.240000 32.020000 ( 33.552620)
# no cache + few methods 31.510000 0.200000 31.710000 ( 32.294752)
# ------------------------------------------------------- total: 67.290000sec
# user system total real
# replacement + many methods 2.330000 0.010000 2.340000 ( 2.382599)
# replacement + few methods 0.430000 0.000000 0.430000 ( 0.438584)
# no replacement + many methods 0.420000 0.000000 0.420000 ( 0.434069)
# no replacement + few methods 0.440000 0.010000 0.450000 ( 0.452091)
# no cache + many methods 31.630000 0.160000 31.790000 ( 32.337531)
# no cache + few methods 36.590000 0.370000 36.960000 ( 40.701712)
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