All the puts() are slower in Java it seems. 2009/6/17 Nick Johnson (Google) <nick.john...@google.com>
> Hi keakon, > > Where do you get your figure of '5 times slower' from? The statistics you > posted demonstrate Python being slightly slower than Java, not the other way > around (and certainly not by a factor of 5). > > -Nick Johnson > > > On Wed, Jun 17, 2009 at 4:44 PM, 风笑雪 <kea...@gmail.com> wrote: > >> I did a datastore performance test with both Java (using JDO) and Python >> tonight, and find Python is much faster than Java. >> I defined a simple model which contains only 1 string property, and you >> can find the code in the attachment. >> >> There are two links for you to test: >> http://java.latest.gaejava.appspot.com >> http://python.latest.gaejava.appspot.com >> >> I found the cpu time and api cpu time are almost the same between Java and >> Python, the only difference is response time. >> I don't know whether it's a defect of Java version or problem of my code >> (it's the first time I write app in Java), can anybody check it? >> >> This is my test result: >> >> Java: >> >>> Add: >>> >>> Time of save 1 entity: 54ms >>> >>> Time of create 100 entities: 0ms >>> >>> Time of save 100 entities: 7765ms >>> >>> >>>> Time of save 1 entity: 52ms >>> >>> Time of create 100 entities: 0ms >>> >>> Time of save 100 entities: 7059ms >>> >>> >>>> Time of save 1 entity: 61ms >>> >>> Time of create 100 entities: 0ms >>> >>> Time of save 100 entities: 7384ms >>> >>> >>>> >>>> Update: >>> >>> Time of fetch 1 entity: 222ms >>> >>> Time of update 1 entity: 25ms >>> >>> Time of fetch 100 entities: 40ms >>> >>> Time of update 100 entities: 7098ms >>> >>> >>>> Time of fetch 1 entity: 33ms >>> >>> Time of update 1 entity: 25ms >>> >>> Time of fetch 100 entities: 35ms >>> >>> Time of update 100 entities: 8038ms >>> >>> >>>> Time of fetch 1 entity: 14ms >>> >>> Time of update 1 entity: 24ms >>> >>> Time of fetch 100 entities: 34ms >>> >>> Time of update 100 entities: 8425ms >>> >>> >>>> >>>> Delete: >>> >>> Time of fetch 1 entity: 16ms >>> >>> Time of delete 1 entity: 82ms >>> >>> Time of fetch 100 entities: 36ms >>> >>> Time of delete 100 entities: 7655ms >>> >>> >>>> Time of fetch 1 entity: 93ms >>> >>> Time of delete 1 entity: 104ms >>> >>> Time of fetch 100 entities: 45ms >>> >>> Time of delete 100 entities: 9825ms >>> >>> >>>> Time of fetch 1 entity: 176ms >>> >>> Time of delete 1 entity: 98ms >>> >>> Time of fetch 100 entities: 60ms >>> >>> Time of delete 100 entities: 7784ms >>> >>> >>>> >>>> >>>> Log: >>> >>> 06-17 07:34AM 51.575 /del 200 8145ms 7970cpu_ms 6823api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:34AM 36.326 /del 200 10094ms 8083cpu_ms 6823api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:34AM 21.466 /del 200 7819ms 7942cpu_ms 6823api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:34AM 02.319 /update 200 8519ms 13189cpu_ms 11929api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:33AM 48.282 /update 200 8159ms 13105cpu_ms 11929api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:33AM 35.099 /update 200 7426ms 13664cpu_ms 11929api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:33AM 20.908 /add 200 7476ms 10684cpu_ms 9453api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:33AM 07.749 /add 200 7146ms 10684cpu_ms 9453api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:32AM 49.846 /add 200 7862ms 10825cpu_ms 9453api_cpu_ms 0kb >>>> java.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> >> Python: >> >>> Add: >>> >>> Time of save 1 entity: 129.576921ms >>> >>> Time of create 100 entities: 2.582073ms >>> >>> Time of save 100 entities: 1210.234880ms >>> >>> >>>> Time of save 1 entity: 54.707050ms >>> >>> Time of create 100 entities: 2.454042ms >>> >>> Time of save 100 entities: 1481.308937ms >>> >>> >>>> Time of save 1 entity: 47.955990ms >>> >>> Time of create 100 entities: 2.021074ms >>> >>> Time of save 100 entities: 1310.760021ms >>> >>> >>>> >>>> Update: >>> >>> Time of fetch 1 entity: 388.538837ms >>> >>> Time of update 1 entity: 53.938150ms >>> >>> Time of fetch 100 entities: 96.820831ms >>> >>> Time of update 100 entities: 1242.298126ms >>> >>> >>>> Time of fetch 1 entity: 409.255028ms >>> >>> Time of update 1 entity: 43.366909ms >>> >>> Time of fetch 100 entities: 92.492104ms >>> >>> Time of update 100 entities: 1119.529963ms >>> >>> >>>> Time of fetch 1 entity: 431.589842ms >>> >>> Time of update 1 entity: 37.049055ms >>> >>> Time of fetch 100 entities: 76.496124ms >>> >>> Time of update 100 entities: 2046.729803ms >>> >>> >>>> >>>> Delete: >>> >>> Time of fetch 1 entity: 417.876959ms >>> >>> Time of delete 1 entity: 62.140942ms >>> >>> Time of fetch 100 entities: 105.495930ms >>> >>> Time of delete 100 entities: 1161.437988ms >>> >>> >>>> Time of fetch 1 entity: 614.541054ms >>> >>> Time of delete 1 entity: 49.677849ms >>> >>> Time of fetch 100 entities: 90.868950ms >>> >>> Time of delete 100 entities: 1129.801989ms >>> >>> >>>> Time of fetch 1 entity: 563.830853ms >>> >>> Time of delete 1 entity: 66.990137ms >>> >>> Time of fetch 100 entities: 188.508034ms >>> >>> Time of delete 100 entities: 1076.126814ms >>> >>> >>>> >>>> Log: >>> >>> 06-17 07:36AM 51.238 /del 200 1979ms 7102cpu_ms 6823api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:36AM 42.483 /del 200 1896ms 6942cpu_ms 6823api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:36AM 33.591 /del 200 1778ms 6962cpu_ms 6823api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:36AM 16.895 /update 200 2605ms 12258cpu_ms 12034api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:36AM 00.586 /update 200 1679ms 12258cpu_ms 12034api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:35AM 51.585 /update 200 1789ms 12230cpu_ms 12034api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:35AM 41.851 /add 200 1367ms 9584cpu_ms 9453api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:35AM 34.596 /add 200 1549ms 9621cpu_ms 9453api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> 06-17 07:35AM 26.595 /add 200 1458ms 9649cpu_ms 9453api_cpu_ms 0kb >>>> python.latest.gaejava.appspot.com Mozilla/5.0 (Windows; U; Windows NT >>>> 5.1; en-US) AppleWebKit/531.0 (KHTML, like Gecko) >>>> Chrome/3.0.187.1Safari/531.0,gzip(gfe) >>> >>> >> >> >> > > > -- > Nick Johnson, App Engine Developer Programs Engineer > Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: > 368047 > > > > > -- Alkis --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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