In this talk, we will look at JavaScriptCore's newest WebAssembly tier, the Low Level Interpreter (LLInt). With the addition of the interpreter, JavaScriptCore now uses three tiers to execute WebAssembly: LLInt, BBQ and OMG. Because of the new interpreter, WebAssembly programs executing in JavaScriptCore now start up 3x faster. Because of the three-tiered approach, we were able to achieve this while maintaining the same throughput performance.