Watch the Tremolodic Bends online guitar lesson by Jennifer Batten from Rock Sauce For Lead Guitar
It's best to get your chops up to a speed where this phrase is comfortable for you as opposed to pushing your limits. The groove will feel much better that way. You want the audience to feel you've got it nailed as opposed to making them feel tense because they're not sure if you're going to make it through! You'd be amazed at what your audience can feel, though most couldn't put it into words. When you practice picking studies, or scale patterns, it's helpful to log how fast you can comfortably play each study flawlessly with a metronome tempo number. Over time, you'll be encouraged by visually seeing your progress!