32 bit vs 64 bit Hans and DarkDust answer covered i386 i686 and amd64 x86 64 so there s no sense in revisiting them This answer will focus on X32 and provide some info learned after a X32 port x32 is an ABI for amd64 x86 64 CPUs using 32 bit integers longs and pointers The idea is to combine the smaller memory and cache footprint from 32 bit data types
Open python console import platform platform architecture 0 it should display the 64bit or 32bit according to your platform Alternatively in case of OS X binaries import sys sys maxsize 2 32 it should display True in case of 64bit and False in case of 32bit edited Mar 13 2023 at 7 05 If you can use project configurations in all your environments that would make defining a 64 and 32 bit symbol easy So you d have project configurations like this 32 bit Debug 32 bit Release 64 bit Debug 64 bit Release EDIT These are generic configurations not targetted configurations Call them whatever you want
32 bit vs 64 bit
32 bit vs 64 bit
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Is My Computer 32 Or 64 Bit And What Is The Difference Between The Two
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How To Find Out If Os Is 32 Bit Or 64 Proofcheek Spmsoalan
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The short answer is that if you run a 32 bit application on a 64 bit machine then it s registry keys are located under a Wow6432Node For example let s say you have an application that stores its registry information under HKEY LOCAL MACHINE SOFTWARE CompanyX If you compile your application as a 64 bit binary and run it on a 64 bit machine 3 Modern processors using an arhitecture such as x64 can execute both 32bit and 64bit applications 32bit operating systems can allocate only 4GB of memory 2 32 4294967296 whereas 64bit ones can allocate a lot more 2 64 18446744073709551616 It is a good practise to install 64bit apps on a 64bit OS because they will be able to use
Feb 28 2010 at 18 33 2 incrediman yes The 64 bit architecture has 64 bit registers and memory addressing and the 32 bit architecture has 32 bit registers That s one of the reasons people use the 64 32 names to differentiate the two Carl Norum Putting that aside however in general you ll have 32 bit size t on 32 bit programs and 64 bit on 64 bit programs regardless of the data model Generally the data model only affects static data for example in GCC mcmodel small Generate code for the small code model the program and its symbols must be linked in the lower 2 GB of the
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Wow My desktop can t even run 32 bit binaries any more I don t think this was sound advice even in 2017 Points 3 and 4 really are reasons to use 64 bit Python since most libraries are built for a 64 bit world and most compilers build 64 bit binaries by default I m pretty sure this was the case in 2017 too 750k 144 943 1 3k 15 For those of use who ve been around long enough the 64 bit transition has some parallels with the 16 bit to 32 bit transition of the mid 80s There were computers that were IL32 and others that were L32 adapting the new notation to the old problem Sometimes int was 16 bit sometimes 32 bit
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32 bit vs 64 bit - Feb 28 2010 at 18 33 2 incrediman yes The 64 bit architecture has 64 bit registers and memory addressing and the 32 bit architecture has 32 bit registers That s one of the reasons people use the 64 32 names to differentiate the two Carl Norum