Leopart performance gains with multi-core Macs?

[BernardLanguillier]

Dear all,

Does this translate into real world performance gains when working with several applications at the same time on a multi-core Intel Mac under Leopard?

Thanks,

Regards,
Bernard

[Schewe]

Only if the apps are written with Cocoa and are multithreaded to take advantage of multiple cores (or processors). Photoshop has used multiple processors since about version 3.0 but it's still written in Carbon which is a 32 bit app environment...only Cocoa apps can take true advantage of Leopard's 64 bit environment...

[BernardLanguillier]

Only if the apps are written with Cocoa and are multithreaded to take advantage of multiple cores (or processors). Photoshop has used multiple processors since about version 3.0 but it's still written in Carbon which is a 32 bit app environment...only Cocoa apps can take true advantage of Leopard's 64 bit environment...
[a href=\"index.php?act=findpost&pid=149965\"][{POST_SNAPBACK}][/a]

Jeff,

My understanding is that Leopard should offer value globally when running several applications at the same time on a multi-core mac.

Even if Adobe products will not run faster on Leopard when they run alone compared to Tiger, my guess is that they shoudl benefit as soon as other processes are also running on the machine at the same time, which is the case for most users, and a lot for me since I typically run stitching jobs in parallel of my work in PS for instance.

What is your view on this?

Thanks.

Regards,
Bernard

[Schewe]

What is your view on this?
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The 10.5 OS will be (is) better optimized for Cocoa apps whether run individually or together and the 10.5 OS kernel is much better optimized for 64 bit and multi-core...so the OS itself will be faster and as long as there's enough "free ram" far less SPWD...even system paging should be better/quicker.

[BernardLanguillier]

The 10.5 OS will be (is) better optimized for Cocoa apps whether run individually or together and the 10.5 OS kernel is much better optimized for 64 bit and multi-core...so the OS itself will be faster and as long as there's enough "free ram" far less SPWD...even system paging should be better/quicker.
[a href=\"index.php?act=findpost&pid=150174\"][{POST_SNAPBACK}][/a]

Thanks,

Regards,
Bernard

[gdeliz]

This paper doesn't talk about Leopard specifically but, on page 2, there is a graph showing the benefits of multiple processors with photoshop.
homepage.mac.com/boots911/.Public/PhotoshopAccelerationBasics2.4W.pdf

George Deliz