All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com
Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Get up to 16x more storage and 2x the speeds of the original drive
Apple 15-inch MacBook Pro
Only $4199 $2299

16GB / 2TB SSD / 2.9GHz / 4GB GPU

Apple Refurbished, Factory Sealed
Apple 1 Year Limited Warranty

OS Mavericks 'App Nap' Kills Photoshop Performance

I decided to run some Photoshop speed tests on the new MPG MacBook Pro, but I was having a devil of a time getting consistent results; I was seeing times literally twice or half as fast as the same test! Test results have to be highly consistent to be of any value.

I was intrigued: how could Photoshop run twice as fast some of the time?

The culprit turned out to be the App Nap feature in OS X Mavericks. As soon as the Prevent App Nap box was checked, all tests ran at full speed and with great consistency.

Apparently App Nap must sense user activity (mouse or keyboard) and if not seen, then nap. Or maybe it’s just a bug, since OS X Mavericks is still alpha quality months after its release—rife with new bugs.

Running a script in Photoshop doesn’t need user interaction (and must not), hence the system takes naps in the middle of the job, in this case benchmark tests!

This is a serious bug for anyone who regularly runs a job-based workflow (think Lightroom or Photoshop batch processing of all sorts and many other applications that might require some time to render or merge or whatever).

Check the Prevent App Nap box for each such application to rule out such huge performance losses (2X).

How to set App Nap
OWC Thunderblade Thunderbolt 3 SSD
Gen 2!

Blazing fast, 1TB, 2TB, 4TB, 8TB.

Lloyd’s all-time favorite SSD!

√ No more slow and noisy hard drives!

Deals Updated Daily at B&H Photo
View all handpicked deals...

InFocus IN1118HD 2400-Lumen Full HD 3D DLP Projector
$699.0 $699
SAVE $0

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__