case level == BestSpeed:
		d.compressionLevel = levels[level]
		d.window = make([]byte, maxStoreBlockSize)
		d.fill = (*compressor).fillStore
		d.step = (*compressor).encSpeed
		d.bestSpeed = newDeflateFast()
		d.tokens = make([]token, maxStoreBlockSize)
	case level == DefaultCompression:
		level = 6
		fallthrough
	case 2 <= level && level <= 9:
		d.compressionLevel = levels[level]
		d.initDeflate()