Function getStartToFirstKeypressMs

frontend/src/ts/test/events/stats.ts:141–173

(eventLog: EventLog)

}

export function getStartToFirstKeypressMs(eventLog: EventLog): number {
  if (eventLog.context.mode === "zen") return 0;

  const { events } = eventLog;

  let firstKeypress: number | undefined;
  let start: number | undefined;

  for (const event of events) {
    if (firstKeypress !== undefined && start !== undefined) {
      break;
    }

    if (firstKeypress === undefined && event.type === "keydown") {
      firstKeypress = event.testMs;
    }

    if (
      start === undefined &&
      event.type === "timer" &&
      event.data.event === "start"
    ) {
      start = event.testMs;
    }
  }

  if (firstKeypress === undefined || start === undefined) {
    return 0;
  }

  const calc = firstKeypress - start;
  return calc < 0 ? 0 : roundTo2(calc);
}

// raw version is needed internally by getTestDurationMs to adjust
// duration in zen/bailout — the public version returns 0 for zen