Let me just explain what I see as the major performance bottleneck with and API implementation: Disk seeks. A typical computer can perform a million calculations while waiting for the disk to fetch a few bytes. So a good data structure that can answer most map (bbox) calls with a single disk seek is what is needed. (Not a debate on the best programming language). I have ideas how to do that if anyone is interested. But I willing to wait and see what Ian comes up with.
-- I'm learning Java right now and I find the array handling quite peculiar. For storing arrays of dynamic size, I use ArrayList<>. The only way to index the elements are with the get() method. Compare that with STL where you can address vectors with the normal [] operator. On Sat, Feb 19, 2011 at 9:46 AM, Anders Arnholm <and...@arnholm.se> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 2011-02-18 22:47, David Murn skrev: >> Is there any language slower or more resource intensive than java? > > Yes, there are many, Java have is strengths and down sides, Java as any > language have it's strengths and down sides. Speed in Java can be much > better that C, C++ or even hand optimized Assembler. It can also and > java's weak sides, for performance, is it's dependence on garbage > collection. That even is proved mathematically be a more efficient way > of handling memory allocations tends to do the memory handling at for > the user bad times. > > And real time performance in almost all applications have very little > with the language to do, but with the chooses of algorithms and > data-storage chosen for the application. > >> currently, in the world), then who cares about java, why isnt it written >> in optimized C or some other similarly lowish level language, rather >> than java? > > There can be a 1000 reasons, and all valid. > A good team knowing java but not c. > C make to much time go into development compared to an object oriented > language. > C have no good api's to connect to the other services around. > The bottle neck is not at all in the code for the service but in stuff > around it. > When is comes to error's in the code, web, net servers in java are as > possible to break, using java is not a safe way to make sure the code is > correct. It still need to be planned and safe for internet usage. The > typical safety problems thou differ because different things are hard > ans easy in the two language families. > > Just a few random morning thoughts. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAk1fdUwACgkQtbR3SXmySrdAnACgrSQlpvvBNqtT32RlIGBssqMO > npcAoKrP8LY3syoJf3lKl4VdZz5yttkK > =EVqp > -----END PGP SIGNATURE----- > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > _______________________________________________ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
