🚀 go-pugleaf

In article <1990Nov6.180958.17256@world.std.com> goodearl@world.std.com (Robert Goodearl) writes:
[ about MSC Library Source ]
>I think the sources would be very useful if you needed to better understand
>the behavior of a library routine, or to make romable code.

In fact, reading over some of the assembler code on those disks, I was
truly impressed by what hoops MS jumps through to squeeze more speed
out of their libraries. For example, string/memory copy functions use
the Intel memmov (REP MOV) instruction, but they also make sure to
word align for improved performance -- these libraries contain an
impressive amount of micro optimization, enough to scare me out of
every wanting to "roll my own".

But prepackaged libraries are not always the fastest, I once looked at
the code in the MPW (Apple Macintosh) C libraries and was unimpressed;
I wrote a strcpy which outperformed their library version.

Joel Spolsky
spolsky@cs.yale.edu                                     Silence = Death