Adobe Acrobat Pro DC is subscription-only (no perpetual license for the new 64-bit version). As of this writing:
The "Recognize Text" feature (ClearScan) is now fully multi-threaded. On a 32-bit version, OCR uses 25% of your CPU. On the 64-bit new version, it can utilize 100% of CPU cores. A 500-page book can be OCR'd in 3 minutes where it previously took 20. adobe acrobat pro dc 64 bit new