響應時間解釋

1、尊敬的商業(yè)總會、監(jiān)理和評測單位:我方在商務平臺項目“軟件需求功能說明書”第88頁“性能需求”中指出“查詢返回速度在3秒內(nèi)” 是指應用程序收到請求后的響應時間，而不是特指加上網(wǎng)絡傳輸時間后的用戶體驗時間。而實際上用戶體 驗時間由應用程序響應時間、網(wǎng)絡傳輸時間以及瀏覽器渲染時間等組成，后兩者可以稱為等待時間。鑒于 此，用戶體驗時間在很大程度上受到等待時間，特別是其中網(wǎng)絡因素的影響。尤其當應用程序部署在互聯(lián) 網(wǎng)環(huán)境中時，由于用戶接入互聯(lián)網(wǎng)機制的不同、接入ISP的不同以及服務器的ISP的不同等諸多的隨機因 素，都有可能直接影響著網(wǎng)絡傳輸?shù)乃俣?。概括說，由于用戶本身所處的網(wǎng)絡環(huán)境以及服務器本身所處的 網(wǎng)

2、絡環(huán)境，直接影響著網(wǎng)絡傳輸?shù)乃俣?。而它們最終影響了用戶體驗時間。下面做一個測試:C：Documents and Settingsqxpping 163 .comPinging 163.cam 01 with 32 bytes of data：Reply fromReply fromReply fromReply from01：01：01：01：bytes=32bytes=32bytes=32bytes=32time=44iis TTL=245time=95iis TTL=245time=167ms TTL=245time=213ms TTL=245Ping statistics for 01:

3、Packets: Sent = 4, Received = 4, Lost = 0 , Approximate round trip times in milli-seconds:Minimum = 44ms, Maximum = 213113, Auerage = 129ms可以看到，ping 163服務器時平均的響應時間是129ms，最大響應時間為213ms。下面是對的測試：C： Documents and Settingsqxpping chinaggcc _Pinging 211 uith 32 bytes of data：Replyfrom21：bytes=3

4、2time=456msTTL=57Replyfrom21：bytes=32time=269msTTL=57Replyfrom21：bytes=32time=368msTTL=57Replyfrom21：bytes=32time=163msTTL=57Ping statistics for 21:Packets: Sent = 4, Receiued = 4, Lost = 0 , Approximate round trip times in milli-seconds:Minimum = 163ms, Maximum =

5、 456ms, Auerage = 314ms平均響應時間是314ms，是163服務器的2.43倍，這是單純的網(wǎng)絡速度測試，由此可見網(wǎng)絡因素對響應時 間的影響非常大。下面是對亞殘官方網(wǎng)站服務器的測試：C：Documents and Settingsqxpping Pinging 3 viith 32 bytes of data：Repli/Repli/Repli/Repli/FromFromFromFrom3：3：3：3：bytes=32bytes=32bytes=32bytes=32time=141ms TTL=54 time=18nis TTL=54 time=153ms time=324

6、msTTL=54TTL=54Ping statistics For 3:,Packets: Sent = 4, Receiued = 4, Lost = 0 Approximate round trip times in milli-seconds:Minimum = 18ms, Maximum = 324ms, fiuerage = 159ms可以看到，它的平均響應時間只有159ms。 下面是又一次隨機的商會服務器測試：C： Documents and Settingsqxpping -tPinging 8 with 32 bytes of dataReplijfrom8bytes32t i

7、me=1052iisTTL=56Replijfrom8bytes32t ime=1133iisTTL=56Replijfrom8bytes32t ime=1274iisTTL=56Replijfrom8bytes32t ime=1013iisTTL=56Replijfrom8bytes32t ime=1100iisTTL=56Replijfrom8bytes32t ime=685insTTL=56Replijfrom8bytes32t ime=886insTTL=56Replijfrom8bytes32t ime=1253iisTTL=56Replijfrom8bytes32t ime=105

8、7iisTTL=56Replijfrom8bytes32t ime=728insTTL=56Replijfrom8bytes32t ime=935insTTL=56Replijfrom8bytes32t ime=584insTTL=56Request timed out.Replijfrom8bytes32t ime=836insTTL=56Replijfrom8bytes32time=1073msTTL=56Replijfrom8bytes32t ime=1093iisTTL=56ReplFfrom8bytes32t ime=603insTTL=56ReplFfrom8bytes32t im

9、e=1158iisTTL=56ReplFfrom8bytes32t ime=615insTTL=56Request timed out.ReplFfrom8bytes32t ime=211insTTL=56ReplFfrom8bytes32t ime=122insTTL=56Repli/from8bytes32t ime=190insTTL=56Repli/from8bytes32time=32iis TTL=56Repli/from8bytes32t ime=287insTTL=56Ping statistics For 8：Packets: Sent = 25, Receiued = 23

10、, Lost = 2 , Approximate round trip times in milli-seconds:Minimum = 32ms, Maximum = 1274ms, fluerage = 779ms Control-C可以看到服務器極不穩(wěn)定，不但平均響應時間達到779ms，而且有兩次請求超時。卜面是對的又一次隨機測試:Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21

11、Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21Replv from 21eplv from 21eplv from 21eplv from 21eplv from 21eplv from 21eplv from 21nepli/ from 21nepli/ from 21nepli/ from 21nepli/ from 21nepli/ from 21nepli/ from 21epli/ from 21e

12、pli/ from 21epli/ from 21epli/ from 21epli/ from 21epli/ from 21epli/ from 21epli/ from 21epli/ from 21heply from 21 bytes=32 time=253nis TTL=57 bytes=32 time=30ms TTL=57 bytes=32 time=321nis TTL=57 bytes=32 time=70ms TTL=57 bytes=32 time=llms TTL=57 bytes=32 time=249ms TTL=57 bytes=32 time=208ms TT

13、L=57 bytes=32 time=654nis TTL=57 bytes=32 time=1057ms TTL=57 bytes=32 time=544ms TTL=57 bytes=32 time=522nis TTL=57 bytes=32 time=581nis TTL=57 bytes=32 time=632nis TTL=57 bytes=32 time=664nis TTL=57 bytes=32 time=567nis TTL=57 bytes=32 time=1163ms TTL=57 bytes=32 time=1109ms TTL=57 bytes=32 time=52

14、1nis TTL=57 bytes=32 time=44ms TTL=57 bytes=32 time=8ms TTL=57 bytes=32 time=75ms TTL=57 bytes=32 time=491nis TTL=57 bytes=32 time=622nis TTL=57 bytes=32 time=644ms TTL=57 bytes=32 time=959nis TTL=57 bytes=32 time=837nis TTL=57 bytes=32 time=497nis TTL=57 bytes=32 time=250nis TTL=57 bytes=32 time=61

15、6nis TTL=57 bytes=32 time=419nis TTL=57 bytes=32 time=894nis TTL=57 bytes=32 time=540ms TTL=57 bytes=32 time=467nis TTL=57 bytes=32 time=173ms TTL=57 bytes=32 time=43ms TTL=57 bytes=32 time=581nis TTL=57 bytes=32 time=640ms TTL=57 bytes=32 time=613nis TTL=57 bytes=32 time=708ms TTL=57 bytes=32 time=687nis TTL=57 bytes=32 time=893nis TTL=57 bytes=32 time=360nis TTL=57Ping s