
The more cores your computer’s processor has, the greater the gains, as each core can build a different part of the preview at the same time. Adobe says a DNG file with fast load data will load up to eight times faster than one without it. This is a partially processed preview that lets Lightroom Classic render previews faster in the Develop module. When you convert a file to DNG in Lightroom Classic it adds something called Fast Load Data to the file.


DNG (short for digital negative) is an open source Raw file format created by Adobe. This is where converting your Raw files to DNG comes in. Using DNG means Lightroom Classic can build previews faster, saving you time. Above: Lightroom Classic builds previews in the Develop module as they are needed.
