Why did I not get readahead when I upgraded from F9 to F10?

[Steven W. Orr]

I noticed that the new F10 boot process is supposed to be somewhat faster 
because it took advantage of a new package called readahead. When I 
upgraded from F9 to F10, I did not get readahead. I did go ahead and I 
added that package to my system. My question is, is there a way to see 
what packages are installed by default on a new install vs what packages 
are installed as part of an upgrade? Or is this a bug?

TIA

-- 
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steveo at syslang.net