Re: PHP on 64bit Ubuntu

On Wed, 2008-09-03 at 16:32 +0200, Aschwin Wesselius wrote: > Robert Cummings wrote: > > On Wed, 2008-09-03 at 15:42 +0200, Per Jessen wrote: > > > > > alexander lind wrote: > > > > > > > > > > I just tested my PHP app on Ubuntu 64bit, and found that all my php > > > > scripts would consume about 5x more RAM memory there, compared to how > > > > much they use on my macbook pro (which to make things a bit more > > > > confusing also runs a 64bit OS). > > > > A page that would take up around 2.5 MB on the macbook, takes around > > > > 12 MB on the linux server. > > > > > > > > Does anyone know what might be causing this? > > > > > > > All pointers are twice the size, same goes for the runtime stack. > > > > > > > But he says it's 5 times the size :) > > > > Cheers, > > Rob. > > > I don't get it that people still think 64-bit is twice the 'size' of > 32-bit. It's like saying 2 square meters is 2 times a square meter, > while actually it is 4 times a square meter. > > So, 64-bits don't just take twice the memory, it can take up much more > than that. Like somebody else says, the integers take a lot of space, > so beware of typecasting properly...... Please explain how it can take up more than twice. If I have a fence segment with 32 vertical pieces (called fence32) and I make a new fence segment with 64 vertical pieces (called fence64) effectively doubling the length. Tell me how building a 20 segment fence with fence64 pieces can possibly more than double the length of the fence created with fence32 pieces? Cheers, Rob. -- http://www.interjinn.com Application and Templating Framework for PHP