Leopard and multicore

I thought that what they meant was that API changes help developers use more cores more efficiently? I didn't understand it as meaning that an existing application would particularly handle multiple cores better without modification. Although, I'm very open to being wrong. This is definitely a big issue... if four and eight and even more cores become commonplace, programming has to catch up. Even among programs that are heavily threaded, work has to actually be well distributed between threads, or else there won't be much advantage.

 

Leopard has features that allow more effective use of processor cache and doesn't swap the program so much between cores.

Also all of the Apps bundled eg. Mail, iPhoto, Disk Verifier are all multi-threaded which should speed up things to.

Tracer

 

i've noticed that when launching programs speeds have been dramatically increased, ~2 seconds for Safari directly after restart, ~1 second for mail, ~4 seconds for iPhoto with 4000 pictures. about 15 seconds for iTunes...not much of a increase over the ~20 before, but still better

 

I have definitely noticed a speed difference in almost all apps and the OS as well with Leopard.

 

I've noticed the same. The speed increase is definitely noticable.