ssdb 客户端性能测试

ParseTest.java

import redis.clients.jedis.exceptions.JedisConnectionException;

/**
 * Created by lvfei on 16/8/1.
 */
public class ParseTest {
    public static void main(String[] args) {


        byte[] buf = {'2', '0', '0', '0'};
        long start = System.currentTimeMillis();

        int count = 50000000;
        for (int i = 0; i < count; i++) {
            long value = parse(buf);
        }

        System.out.println(System.currentTimeMillis() - start);
        start = System.currentTimeMillis();

        for (int i = 0; i < count; i++) {
            long value = stringParse(buf);
        }
        System.out.println(System.currentTimeMillis() - start);
    }

    private static long parse(byte[] buf) {
        long value = 0;


        for (int i = 0; i < buf.length; i++) {
            byte b = buf[i];
            value = value * 10 + b - '0';
        }
        return value;
    }

    private static long stringParse(byte[] buf) {
        String str = new String(buf);

        long l = Long.parseLong(str);
        return l;
    }
}

运行结果：
7
969

有一半的时间消耗在构造 String 对象中。 去除 Long.parseLong(str); 运行结果：

8
454