On Wednesday 19 March 2003 07:10, Pier Fumagalli wrote: > On 18/3/03 23:03, "Stefano Mazzocchi" <[EMAIL PROTECTED]> wrote: > > Pier Fumagalli wrote: > >> On 18/3/03 21:00, "Stefano Mazzocchi" <[EMAIL PROTECTED]> wrote: > >>> I assume, but I'm not sure, that [xx are native internal objects, so > >>> there is not much we can do about those. Still, I would like to know > >>> what is that [10 object that accounts for so much memory. > >> > >> They should be (might be) arrays... As that's the way in which you > >> define them in JNI (roughly).... And the number after that _should_ (but > >> I ain't sure) the type of array that you're actually looking at. Should > >> be one of: > >> > >> #define JVMPI_NORMAL_OBJECT ((jint)0) > >> #define JVMPI_CLASS ((jint)2) > >> #define JVMPI_BOOLEAN ((jint)4) > >> #define JVMPI_CHAR ((jint)5) > >> #define JVMPI_FLOAT ((jint)6) > >> #define JVMPI_DOUBLE ((jint)7) > >> #define JVMPI_BYTE ((jint)8) > >> #define JVMPI_SHORT ((jint)9) > >> #define JVMPI_INT ((jint)10) > >> #define JVMPI_LONG ((jint)11) > >> > >> You never _never_ have access to the JVM internal objects from any > >> whatsoever possible pre-defined interface... And I tried... :-) > > > > Ah, gotcha. > > > > So, the question becomes: what allocates 500Kb of int arrays? > > Hmmm... I overlooked the fact that there was also a "[C", which to me > strikes as a hex digit... So, you can also read that [10 as hex, which > makes 16... So, I don't think it's an "int" array... It's a something-else > array... > > IIRC, Scott Boag once told me that the DTM (the internal pseudo dom used by > Xalan) is only a big huge array... Could that be the case?
Very likely char[] or byte[]. It could be at a very low level, such as Readers and InputStreams. How much buffer does BufferedInputStream allocate initially? Niclas
