Go / Node / Ruby Speed comparison

speedtest.go

package main

import (
	"fmt"
	"math/rand"
	"time"
)

func main() {
	r := rand.New(rand.NewSource(99))

	total := 10000000
	fmt.Println("Prepping.")
	start := time.Now()
	docs := make([]map[string]float64, total)
	for i := 0; i < total; i++ {
		docs[i] = map[string]float64{
			"subtotal": r.Float64(),
			"total":    0.0,
		}
	}
	end := time.Now()
	fmt.Printf("The calls took %v to run.\n", end.Sub(start))

	start = time.Now()
	for i := 0; i < total; i++ {
		docs[i]["total"] = docs[i]["subtotal"] * 1.2
	}
	end = time.Now()

	fmt.Printf("The calls took %v to run.\n", end.Sub(start))
}

speedtest.js

var total = 10000000

console.log("Prepping.")
var start_ts = new Date().getTime()
var docs = []
for (i=0; i<total; i++) {
	docs.push({subtotal: Math.random(100), total: 0.0})
}
var end_ts = new Date().getTime()
console.log("The prep took "+(end_ts-start_ts)+"ms to run.")

console.log("Ready.")
start_ts = new Date().getTime()
for (i=0; i<total; i++) {
	docs[i]['total'] = docs[i]['subtotal'] * 1.2
}
end_ts = new Date().getTime()
console.log("The calls took "+(end_ts-start_ts)+"ms to run.")

speedtest.rb

require "time"

total = 10000000

puts("Prepping.")
start_ts = Time.now
docs = []
total.times {
	docs.push({subtotal: rand, total: 0.0})
}
end_ts = Time.now
puts("The prep took #{(end_ts-start_ts)*1000}ms to run.")

puts("Ready.")
start_ts = Time.now
total.times { |i|
	docs[i][:total] = docs[i][:subtotal] * 1.2
}
end_ts = Time.now
puts("The calls took #{(end_ts-start_ts)*1000}ms to run.")