性能测试如何减少本机误差

package com.okayqa.others.payyst

import com.alibaba.fastjson.JSON
import com.fun.base.constaint.ThreadLimitTimesCount
import com.fun.frame.excute.Concurrent
import com.fun.frame.httpclient.FanLibrary
import com.fun.utils.ArgsUtil
import com.fun.utils.RString
import com.okayqa.common.RSAUtilLJT
import com.okayqa.common.Users
import org.apache.http.client.methods.HttpPost
import org.slf4j.Logger

import java.util.concurrent.LinkedBlockingDeque
import 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()
            }
        }

    }
}