--- a/toolkit/components/telemetry/TelemetryPing.js
+++ b/toolkit/components/telemetry/TelemetryPing.js
@@ -987,18 +987,21 @@ TelemetryPing.prototype = {
         // Notify that data should be gathered now, since ping will happen soon.
         Services.obs.notifyObservers(null, "gather-telemetry", null);
         // The ping happens at the first idle of length IDLE_TIMEOUT_SECONDS.
         idleService.addIdleObserver(this, IDLE_TIMEOUT_SECONDS);
         this._isIdleObserver = true;
       }).bind(this), Ci.nsIThread.DISPATCH_NORMAL);
       break;
     case "get-payload":
+      // This handler returns the current Telemetry payload to the caller.
+      // We only gather startup info once.
+      if (Object.keys(this._slowSQLStartup).length == 0)
+        this.gatherStartupInformation();
       this.gatherMemory();
-      this.gatherStartupInformation();
       let data = this.getCurrentSessionPayloadAndSlug("gather-payload");
 
       aSubject.QueryInterface(Ci.nsISupportsString).data = data.payload;
       break;
     case "test-save-histograms":
       this.saveHistograms(aSubject.QueryInterface(Ci.nsIFile), aData != "async");
       break;
     case "test-load-histograms":