V8 speed tests

gistfile1.builder

require 'rubygems'
require 'v8'

cxt = V8::Context.new


# context switch test

start = Time.now
1000.times { cxt.eval('true') }
puts "V8 1000 context switches: #{(Time.now - start) * 1000}ms"



# string matching

needle = 'bea'
# needle = 'sea'
haystack = 'beatles'
cxt['needle'] = needle
cxt['haystack'] = haystack

start = Time.now
1000.times { haystack.match(needle) }
puts "Ruby 1000 string matches: #{(Time.now - start) * 1000}ms"

start = Time.now
cxt.eval('for (i=0;i<1000;i++) { haystack.search(needle) }')
puts "V8 1000 string matches: #{(Time.now - start) * 1000}ms"



# simple comparison

start = Time.now
(0..200000).each { |n| (n % 3) == 10 }
puts "Ruby 200000 mods: #{(Time.now - start) * 1000}ms"

start = Time.now
cxt.eval('for (i=0;i<200000;i++) { (i % 3) == 0 }')
puts "V8 200000 mods: #{(Time.now - start) * 1000}ms"



# array filter functions

big_array = Array(0..200000)
cxt['big_array'] = big_array

start = Time.now
matches = big_array.find_all { |n| (n % 1001) == 0 }
puts "Ruby simple matches: #{(Time.now - start) * 1000}ms, count: #{matches.size}"

start = Time.now
matches = Array(cxt.eval('big_array.filter(function(n) { return ((n % 1001) == 0) });'))
puts "V8 simple matches: #{(Time.now - start) * 1000}ms, count: #{matches.size}"