> From: peter.crowth...@googlemail.com [mailto:peter.crowth...@googlemail.com] > On Behalf Of Peter Crowther > Subject: Re: [OT] Followup on 32-bit versus 64-bit performance discussion(s)
> > Also, a Java int, when allocated on the stack, must take up the same number > > of bits as a pointer. > That's an interesting space/time trade-off (I presume it's > to prevent excess arithmetic on stack value accesses). It's a requirement of the JVM (not language) spec so that the various stack manipulation byte codes can be independent of the type of data on the stack. A pointer, int, or float must take one stack slot, while a long or double must take two - regardless of the size of a slot. A modern JIT is certainly aware of the type of data in each stack slot, but interpreters aren't, so it's likely to stay that way. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
