c******r
发帖数: 231 | 1 对编程有什么影响么？
也就像写写java,jsp程序~ |
f*****Q
发帖数: 1912 | 2 看你怎么干了，象我这种ssh然后vim的16位的一样用。
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
c******r
发帖数: 231 | 3 在自己机器上跑呢
装一个tomacat, 写点jsp, sevlet
【在 f*****Q 的大作中提到】
: 看你怎么干了，象我这种ssh然后vim的16位的一样用。
|
m*****e
发帖数: 4193 | 4 现在还有仅仅32位的笔记本么？
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
g*****g
发帖数: 34805 | 5 Makes no difference then, it's not likely you'll need
more than 4G memory to debug your web application.
【在 c******r 的大作中提到】
: 在自己机器上跑呢
: 装一个tomacat, 写点jsp, sevlet
|
c******r
发帖数: 231 | 6 什么叫仅仅32位
买的时候有选择系统，win 7 32bit or win 7 64bit
【在 m*****e 的大作中提到】
: 现在还有仅仅32位的笔记本么？
|
m*****e
发帖数: 4193 | 7
That's the OS, not the CPU itself.
I'd go for 64-bit.
Just so that you know, you can download 64-bit win7 and activate with your
32-bit product key, so you can always change your mind later.
【在 c******r 的大作中提到】
: 什么叫仅仅32位
: 买的时候有选择系统，win 7 32bit or win 7 64bit
|
x****u
发帖数: 44466 | 8 现在新的笔记本都是64位的，不过同时兼容32位OS而已。
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
d****2
发帖数: 6250 | 9 这年头还找的到32-bit的general purpose 的 cpu吗？ |
k***r
发帖数: 4260 | 10 I had some problems with apps on a 64bit XP with 8G memory.
To be honest i find that 3G is pretty much all I need for
a desktop dev machine. So all my personal machines are
running 32 bit OS. I sometimes run VMs to take advantage
of my 8G memory at work but they aren't really that performant
even with a lot of RAM. I can't think of any other way to
use the RAM :)
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
|
|
c*****t
发帖数: 1879 | 11 32-bit OS can work with 1 VM (at least in my old setup) at most
and 2 VM is just excruciatingly slow.
With work machine 12GB ram, quad CPU, I run 3 VMs pretty smoothly
(3 VM because I need to run hours long tests for one build,
2 other VM for current builds, one Linux and one Windows).
At the same time, I am still able to run office, VS, eclipse
(for writing small Java utilities, database client, and remote
GDB), browsers, and remote desktops. Currently total using
about 8GB, but it is nice not
【在 k***r 的大作中提到】
: I had some problems with apps on a 64bit XP with 8G memory.
: To be honest i find that 3G is pretty much all I need for
: a desktop dev machine. So all my personal machines are
: running 32 bit OS. I sometimes run VMs to take advantage
: of my 8G memory at work but they aren't really that performant
: even with a lot of RAM. I can't think of any other way to
: use the RAM :)
|
t*******t
发帖数: 105 | 12 64 BIT JDK run apps much faster than the 32 bit counterpart.
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
t*******t
发帖数: 105 | 13 have you had any problems with the VM's access to the host's file system? my
virtualbox windows guest hesitates while accessing/saving word/ppt files, e
ven though my pc is equipped with a quad core intel cpu and 8G ram.
【在 c*****t 的大作中提到】
: 32-bit OS can work with 1 VM (at least in my old setup) at most
: and 2 VM is just excruciatingly slow.
: With work machine 12GB ram, quad CPU, I run 3 VMs pretty smoothly
: (3 VM because I need to run hours long tests for one build,
: 2 other VM for current builds, one Linux and one Windows).
: At the same time, I am still able to run office, VS, eclipse
: (for writing small Java utilities, database client, and remote
: GDB), browsers, and remote desktops. Currently total using
: about 8GB, but it is nice not
|
g*****g
发帖数: 34805 | 14 This is not true. It's slower, the benefit is being able to use more
than 4GB memory, which is important for many server applications.
What are the performance characteristics of 64-bit versus 32-bit VMs?
Generally, the benefits of being able to address larger amounts of memory
come with a small performance loss in 64-bit VMs versus running the same
application on a 32-bit VM. This is due to the fact that every native
pointer in the system takes up 8 bytes instead of 4. The loading of this
ext
【在 t*******t 的大作中提到】
: 64 BIT JDK run apps much faster than the 32 bit counterpart.
|
k***r
发帖数: 4260 | 15 I'm thinking the overhead on 64 bit is greater, i.e.
some memory will be wasted due to 8 byte alignment?
I'm not sure how bad the waste is. I'm not sure if
there are other kind of overheads introduced by 64bit
JVM.
【在 g*****g 的大作中提到】
: This is not true. It's slower, the benefit is being able to use more
: than 4GB memory, which is important for many server applications.
: What are the performance characteristics of 64-bit versus 32-bit VMs?
: Generally, the benefits of being able to address larger amounts of memory
: come with a small performance loss in 64-bit VMs versus running the same
: application on a 32-bit VM. This is due to the fact that every native
: pointer in the system takes up 8 bytes instead of 4. The loading of this
: ext
|
g****y
发帖数: 436 | 16 good points. I am just curious but one of my java console apps that does pur
ely local file io and simple statistics actually runs about 40% faster on a
64 BIT jdk, and it holds for both ubuntu 64 and windows x64.
slower
of
【在 g*****g 的大作中提到】
: This is not true. It's slower, the benefit is being able to use more
: than 4GB memory, which is important for many server applications.
: What are the performance characteristics of 64-bit versus 32-bit VMs?
: Generally, the benefits of being able to address larger amounts of memory
: come with a small performance loss in 64-bit VMs versus running the same
: application on a 32-bit VM. This is due to the fact that every native
: pointer in the system takes up 8 bytes instead of 4. The loading of this
: ext
|
t******r
发帖数: 88 | 17 取决于你的os是多少位的
【在 c******r 的大作中提到】
: 对编程有什么影响么？
: 也就像写写java,jsp程序~
|
g*****g
发帖数: 34805 | 18 File IO should make no difference. My guess is your calculations
under 64 bits can take advantage of more registers.
If you really want to know why, you have to profile your application.
pur
a
【在 g****y 的大作中提到】
: good points. I am just curious but one of my java console apps that does pur
: ely local file io and simple statistics actually runs about 40% faster on a
: 64 BIT jdk, and it holds for both ubuntu 64 and windows x64.
:
: slower
: of
|
