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speed test comparisons for Node and Ruby
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function getRands(i) { | |
var r = []; | |
while (i--) { | |
r[i] = Math.floor(Math.random() * 5); | |
} | |
return r; | |
} | |
function findMatchScore(profileDimensions, verseDimensions) { | |
var i = profileDimensions.length; | |
var diff, total = 0; | |
while (i--) { | |
diff = (profileDimensions[i] - verseDimensions[i]); | |
total += diff * diff; | |
} | |
return total; | |
} | |
function randomMatch(profile) { | |
var verse = getRands(25); | |
var score = findMatchScore(profile, verse); | |
//console.log('score:', score); | |
} | |
function timeIt(i) { | |
var profile = getRands(25); | |
console.log('Matching profile:', profile); | |
while (i--) { | |
randomMatch(profile); | |
} | |
} | |
function testIt() { | |
var a = [0, 0, 0]; | |
var b = [0, 0, 0]; | |
var c = [4, 4, 4]; | |
console.log('should be 0:', findMatchScore(a, b)); | |
console.log('should be 48:', findMatchScore(a, c)); | |
} | |
timeIt(1000000); |
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def rand_n(n, max) | |
randoms = [] | |
n.times do | |
randoms << rand(max) | |
end | |
randoms | |
end | |
def diff_score(a, b) | |
(a - b) * (a - b) | |
end | |
def match_score(a, b) | |
score = 0 | |
a.length.times do |i| | |
score += diff_score a[i], b[i] | |
end | |
return score | |
end | |
user = rand_n(25, 4) | |
1000000.times do | |
message = rand_n(25, 4) | |
match_score user, message | |
end |
jroes
commented
Jul 9, 2013
Just for fun, I wrote a go implementation:
package main
import (
"math/rand"
)
func main() {
user := generateRand(25, 4)
for i := 0; i < 1000000; i++ {
numbers := generateRand(25, 4)
matchScore(user, numbers)
}
}
func generateRand(n int, max int) []int {
numbers := make([]int, n)
for i := 0; i < n; i++ {
numbers[i] = rand.Intn(max)
}
return numbers
}
func matchScore(user []int, numbers []int) int {
score := 0
for i, _ := range user {
score1, score2 := user[i], numbers[i]
score += (score1 - score2) * (score1 - score2)
}
return score
}
○ → time go run revised.go
real 0m1.765s
user 0m1.723s
sys 0m0.040s
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