Some important reason for using 64bit is due to the following.
The effective precision of a float (32bit) is about 5 dp
The effective precision of a double/real*8 (64 bit) is about 10 dp
The number of dp is only approximate since we are encoding this using
binary.
The max/min value of a
I am almost sure this has been addressed before, so you can go after me
for insufficient googling. However,
1. Is there any *significant* advantage in using 64-bit CCP4 binaries
(primarily speed)?
2. IIUC, the standard CCP4 download results in 32-bit binaries being
run on a 64-bit system.
On Thursday, September 01, 2011 11:02:50 am Ed Pozharski wrote:
I am almost sure this has been addressed before, so you can go after me
for insufficient googling. However,
1. Is there any *significant* advantage in using 64-bit CCP4 binaries
(primarily speed)?
2. IIUC, the standard CCP4
In my (SHELX) experience, the difference in performance between 32bit and
64bit versions running on a 64bit OS scarcely justifies distributing two
sets of binaries. The 64bit binaries are usually slightly faster (especially
the multi-CPU SHELXD). As far as I know, there are no problems running
