Re: reading a text file into a string

["Robert I. Eachus" <rieachus@comcast.net>]

Randy Brukardt wrote:

> Anyway, my opinion these days is that spending a lot of effort making
> something run 2% faster is wasted effort. You're always better off changing
> to a different way of solving the problem...

In general agreed.  The only place I currently go through the pain of 
cache aligning data structures is in matrix multiplication and other 
linear algebra code for large matrix sizes.

But there the difference is often a factor of 3 or more in execution time.

How many people actually WRITE such code?  Very few.  That is what ATLAS 
is all about.  It allows you to create a LINPACK and LAPACK version that 
is optimized for your exact execution environment, without worrying 
about all this.  Of course that means that the people who port ATLAS to 
different architectures, are the ones that have to worry about such 
grody details. (And note that the right ATLAS version for Pentium 3 is 
not the right version for Pentium 4, same for Athlon XP and Athlon64 and 
so on.)

-- 

                                           Robert I. Eachus

"The flames kindled on the Fourth of July, 1776, have spread over too 
much of the globe to be extinguished by the feeble engines of despotism; 
on the contrary, they will consume these engines and all who work them." 
-- Thomas Jefferson, 1821