bitmap.go

gistfile1.txt

package main

import (
	"fmt"
	"io/ioutil"
	"math/rand"

	"github.com/RoaringBitmap/roaring"
)

func check(e error) {
	if e != nil {
		panic(e)
	}
}

func main() {
	r1 := roaring.New()
	initsize := 100000000
	for i := 1; i <= initsize; i++ {
		r1.Add(rand.Uint32())
	}

	fmt.Printf("%.1f MB ", float32(r1.GetSizeInBytes())/(1024.0*1024))
	r1.RunOptimize()
	fmt.Printf("%.1f MB ", float32(r1.GetSizeInBytes())/(1024.0*1024))
	data, _ := r1.ToBytes()

	err := ioutil.WriteFile("test.bin", data, 0644)
	check(err)
}