-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Domenico,
On 2/8/2010 11:31 AM, Domenico Marzilli wrote: > Yes, Chris, > it depends on the type of data. > For example: > 1) the elements of an array are addressed with 64 bit pointers; Yes, but the array itself does not take up more space, unless it's full of pointers :) > 2) on a x32 a long (32bit) is as large as a x64; I would imagine that a 32-bit long is 32-bits no matter what architecture it's on. If you mean "what a C compiler will give you if you use 'long int'", then it depends upon the compiler. Most compilers use "standard word length" for "long int" (and sometimes int, too) but it's not part of the C specification. The Java Language Specification requires 'int' to be a 32-bit number while a long is defined to be 64-bits, regardless of the architecture. > By the way, what options for the JVM are you speaking about? Specifically, -XX:+UseCompressedOOPS http://java.sun.com/javase/7/docs/technotes/guides/vm/compressedOops.html http://wikis.sun.com/display/HotSpotInternals/CompressedOops http://confluence.atlassian.com/display/DOC/Garbage+Collector+Performance+Issues#GarbageCollectorPerformanceIssues-Ifusing64bitJREforlargerheaps%2CuseCompressedOops - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAktwSNEACgkQ9CaO5/Lv0PC5HwCfRvyPNkyISsI21zWAn5VBn52x Es8Anj/7+wbrsXOw0LB+HgeR44LFfYUX =cMc2 -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
