Yes. For large batch RAW-to-JPEG jobs, a dedicated RAW workflow app is usually better than Photoshop. Based on the answers, Adobe Lightroom is a stronger fit for high-volume processing and batch export, and Bibble Pro was also mentioned as being very fast.

A few expectations are important:

• RAW conversion is CPU- and disk-intensive, so it won’t become dramatically faster just by opening multiple instances.
• Running parallel jobs may not help much, especially if both jobs are reading and writing on the same physical drive, because disk I/O can become the bottleneck.
• Multi-core support and plenty of RAM can help, but some time is simply inherent to RAW processing.

So the practical answer is:

• Use a dedicated batch-oriented RAW converter such as Lightroom.
• Don’t expect huge gains from launching multiple copies of the software.
• If speed is critical, optimize your workflow and storage, but understand that RAW conversion still takes time compared with in-camera JPEG generation.

If your main work is global adjustments and exporting many files, Lightroom is likely the best fit; if you mainly need localized retouching, Photoshop remains better for that stage.