I've been using exiftool to extract two EXIFs from CR3 images : DateTimeOriginal and SubSecTime. However, it takes about 2 hour handling 10 000 images.
I've written a little program to extract only these tags (cr3_exif_extractor), which is about 500x faster. I was expecting it to be faster (it goes straight to the ExifIFD) but I'm surprised how much. Is there something that I understand incorrectly about ExifTool or is this expected ? Anything I can contribute to help improve performance ?

Command I'm running:

exiftool -progress -csv -DateTimeOriginal -SubSecTime /Volumes/EOS_DIGITAL/E2/**/0L6*.CR3

Info about the images :

• camera: Canon R5 Mark II
• resolution : 8192 x 5464
• file size : ~10 Mo