If what everyone is calling "trills" actually refers to "ornamentation", the I definitely agree about doing it with notation, since specifying each note precisely tends to make it more likely that you can discover how to compose and to play it on your primary instrument in real-time on the fly, which is one of the goals here in the sound isolation studio . . .
Ornamentation (wikipedia)Ornamentation tends to be very rapid, but there are patterns to it, and especially for lead guitar, with enough practice and repetition the patterns become easy to do without needing to think about it in any immediately conscious way . . .
This takes a while and a lot of repetitive mentation, since it involves programming the Frontal Eye Fields (FEF) region of the brain, which is the only way to compose and to play rapid series of notes at a rate of one note every 20 to 50 milliseconds, which curiously, literally, and physically is an area of the brain that is at the top of your head, which makes the colloquial expression, "I just played it off the top of my head" vastly accurate and highly amusing, which is fabulous . . .
Frontal Eye Fields (wikipedia)Fabulous! 
P. S. Programming the FEF region of the brain is fascinating, and the rules are very different from the rules that apply to doing things in an immediately conscious way . . .
I suppose that there are different strategies for programming the FEF region of the brain, but the strategy that works for me is simply to think about it for several months, during which time the key is not to play the instrument and to avoid any of what most folks consider to be "practicing", which is based in part on something I read in a quite obscure book written a few centuries ago by an opera coach, which specifically as it applies to singing states that you should only sing when you feel like singing, because if you force yourself to sing, then you are teaching yourself how to sing in an arbitrarily forced or coerced way, which makes sense when you think about it for a while . . .
In other words, if you force yourself to sing when you really do not want to sing, then you learn how to sing like someone who really does not enjoy singing, and I think the same thing applies to every instrument . . .
And this is where the strategy of "not practicing" originates, because strange as it might appear, when you practice something that you do not know how to do, then you actually are practicing not doing something, which from my perspective is quite counterproductive . . .
Explained another way, I see no point in practicing not being able to do something, and while in some respects it is an odd strategy, it works for me, and it has the benefit of avoiding vast amounts of essentially frivolous "practicing" . . .
There are a few practical caveats to the strategy, and I do an occasional bit of what most folks consider to be practicing, but it is more focused, where it is not done to develop finger strength, agility, dexterity, and so forth, but instead is done to synchronize everything, since by the time you can visualize yourself playing rapidly, your hands and fingers know what to do but might be a tiny bit out of synchronization, which is where a bit of practicing becomes useful, although the focus is on finding the correct zone or whatever one might call it, where for lead guitar it mostly is a matter of getting the timing of working the guitar pick synchronized with doing the finger motions on the fretboard, although for vastly rapid ornamentation instead of using a guitar pick, one uses fingers in a tapping motion, which is more like playing an electric guitar as if it were a grand piano and is a popular style of basically mindless "chickin' pickin'" which is quite popular among
Heavy Metal lead guitar players . . .
[
NOTE: It is easier to understand the general strategy when you think about the way Heavy Metal drummers do rapid double-kick drum patterns, which is something that you somehow "just do", because there really is no other way to do it, and I really like the way Daniel Erlandsson of Arch Enemy does it, for sure, but I am a bit lazy, so I use a pair of Duallist D4 Dual Pedals . . . ]
Duallist D4 Dual Pedal"Ravenous" (Arch Enemy) -- YouTube music videoAs best as I have been able to determine, nobody on this planet can play 50 notes per second and actually think about each note in an immediately conscious way, but this is one of the functions of the FEF region of the brain when it is rewired to work in conjunction with the auditory cortex specifically for composing and playing music in real-time on the fly, and the key is simply
not to think about it but instead to
allow yourself to do it, since
your unconscious mind knows how to do it, and by the time all this stuff makes sense you already have done most of the work required to develop the necessary hand and finger dexterity and so forth and so on, which is fabulous . . .
Fabulous! 
I didn't want to report this as a bug as it isn't really a bug per se. Has no one else experienced this? (i.e. does no one right fast music with trills?)