Any Amount of Computation is Worth It

There are very few specific instructions I can remember being given during my Computer Science course at University. However, one stands out and has stayed with me in the years since:

"Any amount of computation is worth it, to avoid having to draw to the screen."

It's not an exact quote, and my attribution to Dr. Peter Dickman might be nothing more than a hazy recollection, but it's still golden advice.

I've been working on some additions to Blake Seely's MUPhotoView class. In particular, I'm implementing support for drag-reordering the photos in the view. Since the view has to track the user's drag in order to draw the insertion point, it's a performance-critical operation. I don't know about you, dear reader, but I hate stuttery drags.

The difference between calling `[photoView setNeedsDisplay: YES]` and calling `[photoView setNeedsDisplay: myUnionOfDamagedRects]` is remarkable.

Comments

[Blake Seely]

Here here! And I totally agree - never draw if you don't have to.

[hy220]

Glass craft ghd straighteners beads happen to be utilized for producing jewelery items for several centuries like necklaces, bracelets, earrings and rings. wine glass craft beads will often be cheap ghd straighteners utilized for producing jewelery nowadays. they are created from many supplies like metal, terracotta wood, plastic, stone, ivory, ceramic fibre, shell, coral, bones, wine glass and gemstones. But ghd sale among the most utilized for developing crafts is wine glass beads being a end result of the ghd classic fact that you'll be able for making many shapes with wine glass beads like oval, cylindrical, round, heart, square, tube, diamond and teardrop. you'll be able to also make them in lots of ghd hair straighteners colors like green, blue, red, yellow, pink, violet and brown.

[Office 2010]

Windows XP has Microsoft Office 2010 also been criticized Microsoft Office 2007 by some customers for Office 2010 security vulnerabilities, tight Office 2007 integration of applications like Internet Explorer 6 Office 2010 Microsoft and Windows Media Microsoft Office Player Let’s think for another MS office 2007 time. You take 200 customers and Microsoft outlook 2010 stop working with our Affiliate Program Office 2007 key, the reason is that you Microsoft outlook do not have enough time. Then you are able to Office 2007 download earn 4000 every year Outlook 2010! Versions with Service Pack 2, Service Pack 3, and download Office 2007 Internet Explorer 8 addressed Microsoft Office 2010 download some of these concerns. The Benefits of our Program Office 2010 download is written below: first, Our affiliate office 2010 trial program is FREE to take part Office 2010 key in .Then, You are able to earn on every purchase office 2010 pro of your customers. At the same time microsoft office 2010 trial, We have payouts office 2010 home – accept download Office 2010 a check monthly for office 2010 professional your sales.