Function measureCtx

packages/utils/src/lib/user-timing-extensibility-api-utils.ts:474–515

(cfg: MeasureCtxOptions)

 */

export function measureCtx(cfg: MeasureCtxOptions) {
  const { prefix, error: globalErr, ...defaults } = cfg;

  return <T = unknown>(event: string, opt?: MeasureOptions<T>) => {
    const { success, error, ...measurePayload } = opt ?? {};
    const merged = mergeDevtoolsPayload(defaults, measurePayload);
    const {
      startName: s,
      endName: e,
      measureName: m,
    } = getNames(event, prefix);

    return {
      start: () => performance.mark(s, toMarkMeasureOpts(merged)),

      success: (r: T) => {
        const successPayload = mergeDevtoolsPayload(merged, success?.(r) ?? {});
        performance.mark(e, toMarkMeasureOpts(successPayload));
        performance.measure(m, {
          start: s,
          end: e,
          ...asOptions(successPayload),
        });
      },

      error: (err: unknown) => {
        const errorPayload = mergeDevtoolsPayload(
          { ...merged, color: 'error' },
          errorToEntryMeta(err),
          globalErr?.(err) ?? {},
          error?.(err) ?? {},
        );
        performance.mark(e, toMarkMeasureOpts(errorPayload));
        performance.measure(m, {
          start: s,
          end: e,
          ...asOptions(errorPayload),
        });
      },
    };
  };
}