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lines changed Original file line number Diff line number Diff line change @@ -271,14 +271,19 @@ const performanceFallback: CrossPlatformPerformance = {
271271 * Performance wrapper for react native as performance.now() has been found to start off with an unusual offset.
272272 */
273273function getReactNativePerformanceWrapper ( ) : CrossPlatformPerformance {
274- const INITIAL_OFFSET = performance . now ( ) ;
275-
276- return {
277- now ( ) : number {
278- return performance . now ( ) - INITIAL_OFFSET ;
279- } ,
280- timeOrigin : INITIAL_TIME ,
281- } ;
274+ // Performance only available >= RN 0.63
275+ const { performance } = getGlobalObject < Window > ( ) ;
276+ if ( performance && typeof performance . now === 'function' ) {
277+ const INITIAL_OFFSET = performance . now ( ) ;
278+
279+ return {
280+ now ( ) : number {
281+ return performance . now ( ) - INITIAL_OFFSET ;
282+ } ,
283+ timeOrigin : INITIAL_TIME ,
284+ } ;
285+ }
286+ return performanceFallback ;
282287}
283288
284289export const crossPlatformPerformance : CrossPlatformPerformance = ( ( ) : CrossPlatformPerformance => {
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