comparing OpenImageIGO to iMagick

convert_imagick.go

package main

import (
	"github.com/justinfx/imagick/imagick"
	"runtime"
)

const (
	WIDTH  = 320
	HEIGHT = 240
)

var (
	FilePath string = `/tmp/source.png`
	OutPath  string = `/tmp/image_test2.png`
)

func init() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	imagick.Initialize()
}

func main() {
	mw := imagick.NewMagickWand()
	defer mw.Destroy()

	err := mw.ReadImage(FilePath)
	if err != nil {
		panic(err.Error())
	}

	err = mw.ResizeImage(WIDTH, HEIGHT, imagick.FILTER_LANCZOS, 1)
	if err != nil {
		panic(err.Error())
	}

	err = mw.WriteImage(OutPath)
	if err != nil {
		panic(err.Error())
	}
}

convert_oiio.go

package main

import (
	"github.com/justinfx/openimageigo"
	"runtime"
)

const (
	WIDTH  = 320
	HEIGHT = 240
)

var (
	FilePath string = `/tmp/source.png`
	OutPath  string = `/tmp/image_test.png`
)

func init() {
	runtime.GOMAXPROCS(runtime.NumCPU())
}

func main() {
	cache := oiio.CreateImageCache(true)
	src, err := oiio.NewImageBufPathCache(FilePath, cache)
	if err != nil {
		panic(err.Error())
	}

	src.Read(true)

	orig_spec := src.Spec()
	spec := oiio.NewImageSpecSize(WIDTH, HEIGHT, orig_spec.NumChannels(), orig_spec.Format())

	dst, err := oiio.NewImageBufSpec(spec)
	if err != nil {
		panic(err.Error())
	}

	err = oiio.Resize(dst, src, nil, oiio.GlobalThreads)
	if err != nil {
		panic(err.Error())
	}

	err = dst.WriteFile(OutPath, "png")
	if err != nil {
		panic(err.Error())
	}

	// println(cache.GetStats(1))
}

test.txt

$ time ./convert_oiio
real	0m0.214s
user	0m0.904s
sys	0m0.022s

$ time ./convert_imagick
real	0m0.195s
user	0m0.157s
sys	0m0.032s

$ time oiiotool /tmp/source.png -resize 320x240 -o /tmp/image_test3.png 
real	0m0.200s
user	0m0.758s
sys	0m0.081s