method Performance.prototype.markimport { Performance } from "https://deno.land/x/netzo@v0.1.10/deno.d.ts"; mark(markName: string, options?: PerformanceMarkOptions): PerformanceMarkStores a timestamp with the associated name (a "mark"). Stores a timestamp with the associated name (a "mark"). ParametersmarkName: stringoptionaloptions: PerformanceMarkOptionsReturnsPerformanceMark