prediction fail

pred_test.go

package prediction

import (
	"math/rand"
	"testing"
)

func BenchmarkEvery(b *testing.B) {
	howmany := 10000000
	out := [10000000]int{}
	index := 0
	b.ResetTimer()

	for howmany != 0 {
		out[index] = rand.Int()
		index += 1
		howmany--
	}
}

func BenchmarkOnlyOddPredictionFail(b *testing.B) {
	howmany := 10000000
	out := [10000000]int{}
	index := 0
	b.ResetTimer()

	for howmany != 0 {
		val := rand.Int()
		if val%2 != 0 {
			out[index] = val
			index += 1
		}
		howmany--
	}
}

func BenchmarkOnlyOddNonPrediction(b *testing.B) {
	howmany := 10000000
	out := [10000000]int{}
	index := 0
	b.ResetTimer()

	for howmany != 0 {
		val := rand.Int()
		out[index] = val
		index += val & 1
		howmany--
	}
}

https://www.youtube.com/watch?v=wlvKAT7SZIQ