@datadog/mobile-react-native/lib/module/utils/longTasksUtils.js

A client-side React Native module to interact with Datadog

/**
 * 100ms is the lower bound for a noticeable long task event.
 */
const MIN_LONG_TASK_THRESHOLD_MS = 100;

/**
 * 5000ms is considered an Application Not Responding (ANR) event.
 */
const MAX_LONG_TASK_THRESHOLD_MS = 5000;

/**
 * Makes sure the long task threshold value is above 100 and below 5000.
 * Also makes sure it is a number, passing `0` if it is `false`, as the React Native
 * bridge cannot handle values with dual types.
 */
export const adaptLongTaskThreshold = longTaskThreshold => {
  if (!longTaskThreshold) {
    return 0;
  }
  if (longTaskThreshold < MIN_LONG_TASK_THRESHOLD_MS) {
    return MIN_LONG_TASK_THRESHOLD_MS;
  }
  if (longTaskThreshold > MAX_LONG_TASK_THRESHOLD_MS) {
    return MAX_LONG_TASK_THRESHOLD_MS;
  }
  return longTaskThreshold;
};
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