Encoding a movie shouldn't be very I/O intensive. Even it it was, processing the movie ought to produce a sequential workload which harddrives are very good at. SSDs are only a factor 2 to 3 faster in this regard.
More than likely this 'guy' is comparing an older system with HDD to a newer system with SSD, and is believing the higher performance can be attributed to the SSD.
Yep, pretty much all that.
Originally Posted by sub.mesa
Though cutting 2 hours encoding to just 15 seconds is highly doubtful.
You know, that piqued my interest. At first I said no way but then I sat down and I mathed it out and if his old PC had a 16 year old CPU it would account for the 480 fold increase in speed (applying moors' law).
Other possibilities is a RAM configuration issue that caused HDD thrashing and it gets more exotic from there.
For all we know he could have had the old spindle drive plugged in via USB 1.0 cable
... although in retrospect, hardware encoding typically uses configurations that optimize speed for a slight loss of quality which massively improves encode speeds. (software encoding gives you a choice so people choose max quality at any speed cost)
And if you look here
the best case scenario shows a 7.82 fold decrease (althogh its important to note any such quality changes as mentioned above will be included in this figure).
Using this adjustment you lower the assumed age of his cpu from 16 to 9. Now add to that older IO, RAM, etc and it shaves off a few more years from how old said hypothetical estimated computer must be to improve speed from 2 hours to 15 seconds.
Oh, and modern processors took a turn to multi processor dies too which benefits encoding significantly while doesn't benefit single threaded performance as much. I have mathed it past the 9 year mark but I am going to guestimate (before going to bed) that all the above things together could realistically shave off a few more years from that 9 figure. And some people really do upgrade their PC only every 5-6 years
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