You might recognize standup comedian Rachel Feinstein from her recurring roles on HBO’s “Crashing” and the Amazon Prime series “Red Oaks.” She’s also made numerous appearances on “Inside Amy Schumer.” She and Schumer are thick as thieves, as the title of her debut special indicates: “Amy Schumer Presents Rachel Feinstein: Only Whores Wear Purple.” The one-hour program showcases Feinstein’s innate talent for character-driven comedy. From deeply self-deprecating wisecracks to vivid impersonations of her mother, she’s an imaginative and incisive comedic force. Feinstein performs Thursday through Saturday, August 24 through 26, at the Vermont Comedy Club in Burlington.