I went through the 52 RAW files from DPR again and extracted both the fullsize + regular embedded JPEG sizes along with the overall RAW file size. The total percentage of the filesize taken up by both the embedded JPEGs is shown in the export below:
Total RAW FileSize (MB) / % of Filesize From Embedded JPGs
66 14.62
63 12.66
62 10.98
69 12.99
67 15.32
70 16.95
52 7.94
61 11.93
60 10.33
62 12.21
51 6.52
51 5.43
56 14.10
53 10.39
53 9.45
53 9.98
51 5.15
51 6.88
52 7.16
51 6.79
60 19.26
54 11.53
56 14.24
55 13.01
57 15.34
53 10.37
52 8.36
54 10.59
57 15.50
53 10.34
51 5.51
50 4.77
51 5.67
51 6.52
51 5.75
50 4.54
52 7.29
53 9.37
53 10.35
58 17.46
52 7.01
56 14.30
58 6.53
64 7.37
59 9.32
62 9.04
64 8.13
57 6.02
67 6.82
67 6.27
66 7.74
67 7.62
It boggles my mind that Sony engineers would think this would be a good idea at all to waste so much space and CPU time. I bet this is one of the reasons that the Alpha 1 can't actually do the full 30 fps with tracking as shown in the Mark Galer review. It could only do 26.6 fps with tracking and you have to drop down to wide area - no tracking in order to do 30 fps. The CPU is wasting time creating full size JPEGs instead on AF! This is just so plain wrong and absolutely unnecessary for a sports camera! 5-20% of the Sony Alpha 1 RAW file is just a waste of space and time.