After I got Photoshop CS5 I was a bit disappointed at how long it was taking for HDR photos to process when using the new CS5 HDR Pro Module. I know that CS5 is now a 64bit application and therefore capable of addressing more than 2GB of memory . I decided to ask my Twitter follower their opinion about this. Should I get more memory or a faster hard drive (SSD) Some people said, get more memory it will make a difference when using CS5, others said I should really go to a faster hard drive. I currently have a 7200 RPM 320GB hard drive on my mid 2009 uni-body 13″ 2.53GHz Macbook Pro.
Well since I am in the process of getting an Other World Computing (OWC) an Mercury Extreme Pro RE SSD 200GB SATA 3.0G/s Solid-State Drive for review I figured I would also get more memory now and see what difference that made. I had a big fat gift certificate from Amazon, so I decided to use it on 8GB of Crucial memory, for a whooping $388.99 U.S.
Results
Below are the before and after test results of my Macbook Pro with 4GB of RAM versus, 8GB of RAM. As you will see the results are underwhelming at best for the money. These are real world results, your milage may vary: and if it does let me know.

As you can see the boot time between the two is a bit better from a cold start, but the actual time form the login screen until to all the icons on my desktop to stop bouncing, is actually worse with 8GB of RAM. I can’t explain this, but I was frankly disappointed with this first result.

This test measures the time it took to start up some of my most used applications. The biggest bang for the buck was in the 12.2 second improvement on the start time of Photoshop CS5. I attribute this dramatic improvement to the fact that CS5 is running in 64bit mode, and because of that, it is able to use the multi core processor, and access most of my 8GB of RAM. This is very beneficial to me, and made me feel better after the disappointing boot tests.

This test took 3 HDR photos chosen in Lightroom 2, and then imported them to the CS5 HDR Pro Module. The time shown is how long it took for the entire process from the moment I press “Merge to HDR in Photoshop,” to the moment the CS5 HDR Modules finished loading. Although I gained 31.3 seconds by using 8GB or RAM, I was not impressed. This same operations took just 43.3 seconds on my 2007 2X2.66GHZ Dual Core Intel Xeon MacPro with 8GB of RAM (I know Apples and Oranges).
Is spending $389 on 8GB of RAM worth it? In this case I’d say …not so far. Perhaps when I add the SSD drive to the system I’ll seem much more dramatic results. Unfortunately I’ve come to the conclusion that until more applications can access RAM, I could have spent the money in better ways. Let me know your thoughts and experiences by writing a comment.