So I’ve been complaining for some time about the speed of Adobe’s Lightroom photo processing software.
I finally got around to doing some comparisons of import times, using files from different cameras. My initial thought was that the auto-correction used by micro 4/3 lenses was slowing things down on my recently acquired E-M5, along with larger files. To test that theory, I took 100 RAW files from a number of different cameras and lenses, and measured how long it took to import them and generate 1:1 previews.
|Camera||Size||Format||Lens Correction||Running time (s)|
|Nikon D70||6.1 MP||NEF||No||172|
|Nikon D700||12.1 MP||NEF||No||318|
|Olympus E-410||10.1 MP||ORF||No||392|
|Olympus E-620||12.3 MP||ORF||No||446|
|Olympus E-PM1||12.3 MP||ORF||Yes||493|
|Olympus E-M5||16.2 MP||ORF||No||580|
|Olympus E-M5||16.2 MP||ORF||Yes||600|
As is clear in the table, it turns out that lens correction actually doesn’t have a huge impact – enabling it (or using a lens that enables it automatically) causes less than a 5% performance hitch. On the flip side, increasing the number of pixels seems to linearly increase runtime.
What is also obvious is that the Olympus ORF’s file format takes a good bit more time and energy to process than Nikon’s NEF files. Processing 10MP ORFs takes roughly 25% more time than processing 12MP NEFs! I suppose I’ll have to add that to my already lengthy list of ‘things Olympus could afford to borrow from competitors’.