Base64實現測試,不要太相信apache-common的性能

針對三種Base64實現:java

* 自已實現的apache

* JDK8的java.util.Base64性能

* apache-common的org.apache.commons.codec.binary.Base64測試

	/**
	 * 用於命令行調用
	 * 
	 * @throws Exception
	 */
	public static void main(String[] args) throws Exception {
		
		byte[] binaryData = "這是一個小小的測試 this is a test only".getBytes();
		
		long t1 = System.currentTimeMillis();
		
		for (int i = 0; i < 10000 * 1000; i++)
			Base64.decode(Base64.encode(binaryData));
		
		long t2 = System.currentTimeMillis();
		
		Encoder encoder = java.util.Base64.getEncoder();
		Decoder decoder = java.util.Base64.getDecoder();
		for (int i = 0; i < 10000 * 1000; i++)
			decoder.decode(encoder.encodeToString(binaryData));
		
		long t3 = System.currentTimeMillis();
		
		for (int i = 0; i < 10000 * 1000; i++)
			org.apache.commons.codec.binary.Base64.decodeBase64(org.apache.commons.codec.binary.Base64.encodeBase64String(binaryData));
		
		long t4 = System.currentTimeMillis();
		
		System.out.println("t2-t1:"+(t2-t1));
		System.out.println("t3-t2:"+(t3-t2));
		System.out.println("t4-t3:"+(t4-t3));
	}

  

測試結果:this

t2-t1:7871  #本身實現的
t3-t2:2820  #JDK8自帶的
t4-t3:25142 #apache-common的命令行

不要太相信apache-common的性能。code

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