fix(apm): Check if performance.mark() exists

Author: AbhiPrasad

CHANGELOG.md

@@ -10,6 +10,7 @@
 - [core] fix: Call `bindClient` when creating new `Hub` to make integrations work automatically (#2665)
 - [gatsby] feat: Add @sentry/gatsby package (#2652)
 - [core] ref: Rename `whitelistUrls/blacklistUrls` to `allowUrls/denyUrls`
+- [apm] fix: Check if `performance.mark` exists before calling it
 
 ## 5.17.0
 

packages/apm/src/integrations/tracing.ts

@@ -170,7 +170,9 @@ export class Tracing implements Integration {
    */
   public constructor(_options?: Partial<TracingOptions>) {
     if (global.performance) {
-      global.performance.mark('sentry-tracing-init');
+      if (global.performance.mark) {
+        global.performance.mark('sentry-tracing-init');
+      }
       Tracing._trackLCP();
     }
     const defaults = {