There is no absolute about how fast you should be able to play after some amount of practice. Everyone will be different. The best way to increase speed is to measure your playing with a metronome. To the Jeff Berlin fans, I am suggesting using the metronome simply as a measuring device.
Start at a tempo that you can handle, like 100BPM in your example, and play a repeating pattern that you don’t have to think about. NOT those two syncopated bars of Parliament

Open strings, a scale, a single bar riff, etc.
Play only that for at least five minutes without making a mistake or slowing down. If you can't do that, notch the metronome
down a bit and try to play for five minutes without making a mistake.
Keep a record of the fastest tempo where you can play something simple in 16th notes for five minutes. Every day, start at that tempo and make sure you can still play it that fast. If so, notch the metronome up a bit. If you cannot play that fast for five minutes, go back to the previous tempo the next day. If you feel any pain from playing fast, stop and take a 10-15 minute break.
Once you can play at the tempo of the song you are struggling with, try playing sections of it along with the metronome as above. Start well below the final tempo. If it’s 110, start at 90 maybe. Do the same thing….five minutes without a mistake before you notch up the tempo and keep track of the highest tempo every day. Ideally keep working at it until you can play it a notch faster than the recording.
Do this as just a part of your practice routine. If you're playing an hour a day, do this for 15-20 minutes nd give it a break until the next day.