Lightroom: When using smart previews, what determines image load time in Develop Module? SSD Speed? PCU Speed?

  • 1
  • Question
  • Updated 3 months ago
  • Answered
  • (Edited)
Photo of Josef Kissinger

Josef Kissinger

  • 15 Posts
  • 0 Reply Likes

Posted 3 months ago

  • 1
Photo of Johan Elzenga

Johan Elzenga, Champion

  • 1541 Posts
  • 622 Reply Likes
Both. The smart preview needs to be loaded, and then the develop preview needs to be rendered.
Photo of Josef Kissinger

Josef Kissinger

  • 15 Posts
  • 0 Reply Likes
Ok, thanks. Then do you know for a fact what ssd specs matter more? Im deciding between a samsung 970pro and an intel optane 905p. Both excel at different areas. Thanks.
Photo of Johan Elzenga

Johan Elzenga, Champion

  • 1499 Posts
  • 598 Reply Likes
No, but I doubt the differences will be so large that you will ever notice.
Photo of Josef Kissinger

Josef Kissinger

  • 15 Posts
  • 0 Reply Likes
For most users, probably not, but if you are editing 1000+ images, saving milliseconds here and milliseconds there will make a difference over the course of the day. Im still interested, if anybody knows whether read performance, write performance, random access iops, latency, etc. will have the most impact on lightroom speed, albeit even a small amount. Thank you!
Photo of James Hess

James Hess

  • 224 Posts
  • 34 Reply Likes
Is there a specific issue here? From my perspective, if the smart previews are on a SSD then read performance should be no issue whatsoever.
Photo of Josef Kissinger

Josef Kissinger

  • 15 Posts
  • 0 Reply Likes
I dont know yet, thats why im asking. Im building a Lightroom PC with a delidded, overclocked 8086K. I dont want any ssd bottle necks. Right now im using a 2017 Macbook pro and there is some serious lag in the develop module using smart previews. Going from one image to the next, there is lag before the image is editable. Maybe a faster cpu will take care of that. Or maybe i need 4 m.2 ssd's in a pcie raid controller to get into the 12,000 read/write territory. But that doenst help the latency. The intel optane 905p has lower latency. If i could just buy the fastest ssd i would. but i dont know what is faster. I need to know how lightroom utilizes ssds.
Photo of James Hess

James Hess

  • 224 Posts
  • 34 Reply Likes
My experience tells me that you won't gain any performance benefit by having your images on a SSD. I have a SSD as my system drive. Lightroom is installed on that drive, and that is where the catalog is stored. My images are stored on spinning hard drives, and I don't have any lag moving from image to image. I'm using an old HP Pavilion computer that was converted from Windows 7, and is now running Windows 10. Only will accommodate 8 GB RAM. My spinning hard drives are 7200 RPM. My concern is if you go all out thinking that you are buying the absolute top-of-the-line everything and buying the fastest processor available you are likely to run into one of those bottlenecks that many supercomputer builders encounter. Good luck.