在接口测试过程中，某个线程连续两次请求中间都会消耗的时间，线程在收到响应进行第二次请求的时候会消耗一些时间，比如进行结果验证，日志存储，或者进行数据统计等等。

一般来讲这些时间都是微秒级别的，偶尔会遇到一些毫秒级别的，比如这次：​​线程安全类在性能测试中应用​​，中间参数签名的消耗时间在10ms级别，如果在并发的情况下甚至达到100ms，而且对本机的CPU资源消耗也比较厉害。

解决办法： 提前将数据签名，以空间换时间，先把所有的参数签名完毕，然后再去发送请求。

中间用到了线程安全的队列​​LinkedBlockingDeque​​，这个可以帮助我们解决掉数据可能会重复的问题。

新版发代码如下：

package com.okayqa.others.payyst
import com.alibaba.fastjson.JSONimport com.fun.base.constaint.ThreadLimitTimesCountimport com.fun.frame.excute.Concurrentimport com.fun.frame.httpclient.FanLibraryimport com.fun.utils.ArgsUtilimport com.fun.utils.RStringimport com.okayqa.common.RSAUtilLJTimport com.okayqa.common.Usersimport org.apache.http.client.methods.HttpPostimport org.slf4j.Logger
import java.util.concurrent.LinkedBlockingDequeimport java.util.concurrent.atomic.AtomicInteger
class T extends FanLibrary {static Logger logger = getLogger(T.class)
static LinkedBlockingDeque<Map<String, String>> ppp = new LinkedBlockingDeque<>()
static AtomicInteger i = new AtomicInteger(111000);
publicstaticvoid main(String[] args) {def argsUtil = new ArgsUtil(args)def thread = argsUtil.getIntOrdefault(0, 1)def times = argsUtil.getIntOrdefault(1, 100)
def ps = []
        thread.times {//            def mark = new HeaderMark("requestid")            ps << new Thr(times)        }
new Concurrent(ps, "参数提前初始化").start()

def reqs = []
        thread.times {//            def mark = new HeaderMark("requestid")            reqs << new Thr(times)        }
new Concurrent(reqs, "会员支付和续费接口").start()        testOver()    }
publicstatic Map<String, String> getParams() {def add = i.getAndAdd(1)        Map<String, String> p = new HashMap<>();        p.put("days", "1");        p.put("memberId", "208");        p.put("orderNo", "F" + RString.getString(4) + add);        p.put("orderPaySystemId", "85123213");        p.put("orderPayTime", "2020-02-09 10:00:00");        p.put("payMoney", "30");        p.put("recordSources", "3");        p.put("renewal", "false");def user = Users.getStuUser(add % 1000)        p.put("systemId", user);        String sign = RSAUtilLJT.sign(p, RSAUtilLJT.getPrivateKey(RSAUtilLJT.RSA_PRIVATE_KEY));        p.put("sign", sign);return p;    }

staticclass P extends ThreadLimitTimesCount {public P(int times) {super(null, times, null);        }
@Overrideprotectedvoid doing() throws Exception {def add = i.getAndAdd(1)            Map<String, String> p = new HashMap<>();            p.put("days", "1");            p.put("memberId", "208");            p.put("orderNo", "F" + RString.getString(4) + add);            p.put("orderPaySystemId", "85123213");            p.put("orderPayTime", "2020-02-09 10:00:00");            p.put("payMoney", "30");            p.put("recordSources", "3");            p.put("renewal", "false");def user = Users.getStuUser(add % 1000)            p.put("systemId", user);            String sign = RSAUtilLJT.sign(p, RSAUtilLJT.getPrivateKey(RSAUtilLJT.RSA_PRIVATE_KEY));            p.put("sign", sign);            ppp.add(p)        }    }
staticclass Thr extends ThreadLimitTimesCount {static Logger logger = getLogger(Thr.class)
public Thr(int times) {super(null, times, null);        }
@Overrideprotectedvoid doing() throws Exception {            String url = com.okayqa.studentapd.base.OkayBase.HOST + "/api/member/createOrRenewMember"            HttpPost post = getHttpPost(url, JSON.toJSONString(ppp.take()));def s = "F" + getNanoMark()            post.addHeader(getHeader("requestid", s));
def simlple = FanLibrary.excuteSimlple(post)if (!simlple.contains("success")) {                logger.warn(s + OR + user + simlple.toString())                fail()            }        }
    }}

经过上期文章：​​利用微基准测试修正压测结果​​验证方法，稳稳的OK。

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性能测试如何减少本机误差_性能测试