Initial commit

quartz/util/perf.ts

@@ -0,0 +1,19 @@
+import pretty from "pretty-time"
+import { styleText } from "util"
+
+export class PerfTimer {
+  evts: { [key: string]: [number, number] }
+
+  constructor() {
+    this.evts = {}
+    this.addEvent("start")
+  }
+
+  addEvent(evtName: string) {
+    this.evts[evtName] = process.hrtime()
+  }
+
+  timeSince(evtName?: string): string {
+    return styleText("yellow", pretty(process.hrtime(this.evts[evtName ?? "start"])))
+  }
+}