Fixed an issue where spans weren't sent when BugsnagPerformance has been started on a background thread (#539)

Co-authored-by: Robert Bartoszewski <[email protected]>

Author: robert-smartbear

BugsnagPerformance.xcodeproj/project.pbxproj

@@ -147,6 +147,8 @@
 		96F129312DCD325E00A6FB2B /* BugsnagPerformanceSpanTests.mm in Sources */ = {isa = PBXBuildFile; fileRef = 96F129302DCD325E00A6FB2B /* BugsnagPerformanceSpanTests.mm */; };
 		96F417152E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.h in Headers */ = {isa = PBXBuildFile; fileRef = 96F417122E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.h */; };
 		96F417162E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.docc in Sources */ = {isa = PBXBuildFile; fileRef = 96F417132E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.docc */; };
+		96F9010F2EE817620026F5B9 /* NSTimer+MainThread.h in Headers */ = {isa = PBXBuildFile; fileRef = 96F9010E2EE8175B0026F5B9 /* NSTimer+MainThread.h */; };
+		96F901112EE817700026F5B9 /* NSTimer+MainThread.m in Sources */ = {isa = PBXBuildFile; fileRef = 96F901102EE817690026F5B9 /* NSTimer+MainThread.m */; };
 		CB04969729150D860097E526 /* OtlpPackage.h in Headers */ = {isa = PBXBuildFile; fileRef = CB04969529150D860097E526 /* OtlpPackage.h */; };
 		CB04969829150D860097E526 /* OtlpPackage.mm in Sources */ = {isa = PBXBuildFile; fileRef = CB04969629150D860097E526 /* OtlpPackage.mm */; };
 		CB04969B2915194E0097E526 /* OtlpUploader.h in Headers */ = {isa = PBXBuildFile; fileRef = CB0496992915194E0097E526 /* OtlpUploader.h */; };
@@ -486,6 +488,8 @@
 		96F129302DCD325E00A6FB2B /* BugsnagPerformanceSpanTests.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = BugsnagPerformanceSpanTests.mm; sourceTree = "<group>"; };
 		96F417122E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = BugsnagPerformanceNamedSpans.h; sourceTree = "<group>"; };
 		96F417132E3B8E7000EABD8E /* BugsnagPerformanceNamedSpans.docc */ = {isa = PBXFileReference; lastKnownFileType = folder.documentationcatalog; path = BugsnagPerformanceNamedSpans.docc; sourceTree = "<group>"; };
+		96F9010E2EE8175B0026F5B9 /* NSTimer+MainThread.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "NSTimer+MainThread.h"; sourceTree = "<group>"; };
+		96F901102EE817690026F5B9 /* NSTimer+MainThread.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = "NSTimer+MainThread.m"; sourceTree = "<group>"; };
 		CB04969529150D860097E526 /* OtlpPackage.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = OtlpPackage.h; sourceTree = "<group>"; };
 		CB04969629150D860097E526 /* OtlpPackage.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = OtlpPackage.mm; sourceTree = "<group>"; };
 		CB0496992915194E0097E526 /* OtlpUploader.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = OtlpUploader.h; sourceTree = "<group>"; };
@@ -721,8 +725,6 @@
 		0122C21F29019770002D243C /* Private */ = {
 			isa = PBXGroup;
 			children = (
-				1C7852A32E5F697D00BB8E2D /* SpanContext.mm */,
-				1C7852A12E5F5B2E00BB8E2D /* SpanContext.h */,
 				CB572EA829BB783200FD7A2A /* AppStateTracker.h */,
 				CB572EA929BB783200FD7A2A /* AppStateTracker.m */,
 				CBE8EA1C294B5E1500702950 /* Batch.h */,
@@ -768,6 +770,8 @@
 				098FC8772D3E8D43001B627D /* Metrics.h */,
 				09D59E182BDFE0D900199E1B /* NetworkHeaderInjector.h */,
 				09D59E192BDFE0D900199E1B /* NetworkHeaderInjector.mm */,
+				96F9010E2EE8175B0026F5B9 /* NSTimer+MainThread.h */,
+				96F901102EE817690026F5B9 /* NSTimer+MainThread.m */,
 				CBB48A3A295EE1E10044E9AC /* ObjCUtils.h */,
 				CBB48A3B295EE1E10044E9AC /* ObjCUtils.mm */,
 				CB04969529150D860097E526 /* OtlpPackage.h */,
@@ -795,6 +799,8 @@
 				01A414CC2913C0F0003152A4 /* SpanAttributes.mm */,
 				96D4160D29F276FE00AEE435 /* SpanAttributesProvider.h */,
 				96D4160B29F276E400AEE435 /* SpanAttributesProvider.mm */,
+				1C7852A12E5F5B2E00BB8E2D /* SpanContext.h */,
+				1C7852A32E5F697D00BB8E2D /* SpanContext.mm */,
 				963726C42DEAB14D00C739E6 /* SpanControl */,
 				0122C22329019770002D243C /* SpanKind.h */,
 				CB7FD935299D330500499E13 /* SpanOptions.h */,
@@ -1179,6 +1185,7 @@
 				CBEBE59A29F671A800BF0B4F /* Instrumentation.h in Headers */,
 				CBE8EA1E294B5E1500702950 /* Batch.h in Headers */,
 				CBEBE59329F2783C00BF0B4F /* Swizzle.h in Headers */,
+				96F9010F2EE817620026F5B9 /* NSTimer+MainThread.h in Headers */,
 				CBEC51BC296D9EEE009C0CE3 /* PersistentState.h in Headers */,
 				0122C23829019770002D243C /* BugsnagPerformanceSpan.h in Headers */,
 				966634DA2C8A39B1004A934D /* FrozenFrameData.h in Headers */,
@@ -1632,6 +1639,7 @@
 				CBE8EA1B294B5AB800702950 /* Worker.mm in Sources */,
 				CB78819C29E587CE00A58906 /* BugsnagPerformanceLibrary.mm in Sources */,
 				963726E02DF0B4AD00C739E6 /* BugsnagPerformancePluginContext.m in Sources */,
+				96F901112EE817700026F5B9 /* NSTimer+MainThread.m in Sources */,
 				098FC8552D37A08D001B627D /* SystemInfoSampler.mm in Sources */,
 				963726C82DEAB1FC00C739E6 /* BugsnagPerformancePriority.m in Sources */,
 				0122C23C29019770002D243C /* BugsnagPerformanceConfiguration.mm in Sources */,

Sources/BugsnagPerformance/Private/BugsnagPerformanceImpl.mm

@@ -18,6 +18,7 @@
 #import "FrameRateMetrics/FrameMetricsCollector.h"
 #import "ConditionTimeoutExecutor.h"
 #import "BugsnagPerformanceSpan+Private.h"
+#import "NSTimer+MainThread.h"
 
 using namespace bugsnag;
 
@@ -246,9 +247,9 @@
     [worker_ start];
     [frameMetricsCollector_ start];
 
-    workerTimer_ = [NSTimer scheduledTimerWithTimeInterval:performWorkInterval_
-                                                   repeats:YES
-                                                     block:^(__unused NSTimer * _Nonnull timer) {
+    workerTimer_ = [NSTimer mainThreadTimerWithTimeInterval:performWorkInterval_
+                                                    repeats:YES
+                                                      block:^(__unused NSTimer * _Nonnull timer) {
         blockThis->onWorkInterval();
     }];
 

Sources/BugsnagPerformance/Private/ConditionTimeoutExecutor.h

@@ -10,6 +10,7 @@
 
 #import <Foundation/Foundation.h>
 #import "BugsnagPerformanceSpanCondition+Private.h"
+#import "NSTimer+MainThread.h"
 #import <map>
 #import <mutex>
 
@@ -21,7 +22,7 @@ class ConditionTimeoutExecutor {
 
     void sheduleTimeout(BugsnagPerformanceSpanCondition *condition, NSTimeInterval timeout) noexcept {
         std::lock_guard<std::mutex> guard(mutex_);
-        this->conditionIdToTimer_[condition.conditionId] = [NSTimer scheduledTimerWithTimeInterval:timeout repeats:NO block:^(NSTimer *) {
+        this->conditionIdToTimer_[condition.conditionId] = [NSTimer mainThreadTimerWithTimeInterval:timeout repeats:NO block:^(NSTimer *) {
             [condition didTimeout];
         }];
     }

Sources/BugsnagPerformance/Private/NSTimer+MainThread.h

@@ -0,0 +1,19 @@
+//
+//  NSTimer+MainThread.h
+//  BugsnagPerformance
+//
+//  Created by Robert Bartoszewski on 09/12/2025.
+//  Copyright © 2025 Bugsnag. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSTimer (MainThread)
+
+/// Creates and returns a new NSTimer object initialized with the specified block object and schedules it on the main run loop in the default mode.
+/// - parameter:  ti    The number of seconds between firings of the timer. If seconds is less than or equal to 0.0, this method chooses the nonnegative value of 0.1 milliseconds instead
+/// - parameter:  repeats  If YES, the timer will repeatedly reschedule itself until invalidated. If NO, the timer will be invalidated after it fires.
+/// - parameter:  block  The execution body of the timer; the timer itself is passed as the parameter to this block when executed to aid in avoiding cyclical references
++ (NSTimer *)mainThreadTimerWithTimeInterval:(NSTimeInterval)interval repeats:(BOOL)repeats block:(void (NS_SWIFT_SENDABLE ^)(NSTimer *timer))block API_AVAILABLE(macosx(10.12), ios(10.0), watchos(3.0), tvos(10.0));
+
+@end

Sources/BugsnagPerformance/Private/NSTimer+MainThread.m

@@ -0,0 +1,27 @@
+//
+//  NSTimer+MainThread.m
+//  BugsnagPerformance
+//
+//  Created by Robert Bartoszewski on 09/12/2025.
+//  Copyright © 2025 Bugsnag. All rights reserved.
+//
+
+#import "NSTimer+MainThread.h"
+
+@implementation NSTimer (MainThread)
+
++ (NSTimer *)mainThreadTimerWithTimeInterval:(NSTimeInterval)interval repeats:(BOOL)repeats block:(void (NS_SWIFT_SENDABLE ^)(NSTimer *timer))block {
+    NSTimer *timer = [self timerWithTimeInterval:interval repeats:repeats block:block];
+    if ([NSThread isMainThread]) {
+        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
+    } else {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            if ([timer isValid]) {
+                [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
+            }
+        });
+    }
+    return timer;
+}
+
+@end

features/default/manual_spans.feature

@@ -568,6 +568,15 @@ Feature: Manual creation of spans
     * the trace payload field "resourceSpans.0.scopeSpans.0.spans.1.parentSpanId" matches the regex "^[A-Fa-f0-9]{16}$"
     * the trace payload field "resourceSpans.0.scopeSpans.0.spans.2.parentSpanId" is null
 
+Scenario: Manually start and end spans after starting BugsnagPerformance on a background thread
+    Given I run "BackgroundThreadStartScenario"
+    And I wait to receive at least 2 spans
+    Then the trace "Content-Type" header equals "application/json"
+    * the trace "Bugsnag-Integrity" header matches the regex "^sha1 [A-Fa-f0-9]{40}$"
+    * the trace "Bugsnag-Sent-At" header matches the regex "^\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\d\.\d\d\dZ$"
+    * a span field "name" equals "BackgroundThreadStartScenarioEarlySpan"
+    * a span field "name" equals "BackgroundThreadStartScenarioSpan"
+    
   Scenario: Parent context should be calculated despite blocked spans on the stack
     Given I run "ManualParentBlockedSpanScenario"
     And I wait to receive at least 4 spans
@@ -581,4 +590,3 @@ Feature: Manual creation of spans
     * a span named "ManualParentBlockedSpanScenarioBlocked1" is a child of span named "ManualParentBlockedSpanScenarioParent"
     * a span named "ManualParentBlockedSpanScenarioBlocked2" is a child of span named "ManualParentBlockedSpanScenarioBlocked1"
     * a span named "ManualParentBlockedSpanScenarioChild" is a child of span named "ManualParentBlockedSpanScenarioParent"
-

features/fixtures/ios/Fixture.xcodeproj/project.pbxproj

@@ -81,6 +81,7 @@
 		96DADF512EAFCB1100B56CE6 /* ManualSpanEndOnDestroyScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96DADF502EAFCB1100B56CE6 /* ManualSpanEndOnDestroyScenario.swift */; };
 		96F129352DCE0CFE00A6FB2B /* ManualSpanWithRemoteContextParentScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F129342DCE0CFE00A6FB2B /* ManualSpanWithRemoteContextParentScenario.swift */; };
 		96F5268C2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F5268B2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift */; };
+		96F901132EE81E580026F5B9 /* BackgroundThreadStartScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F901122EE81E580026F5B9 /* BackgroundThreadStartScenario.swift */; };
 		96F901172EE836CC0026F5B9 /* ManualParentBlockedSpanScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F901162EE836CC0026F5B9 /* ManualParentBlockedSpanScenario.swift */; };
 		96F901092EE7B7FF0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F901082EE7B7FF0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift */; };
 		CB0496942913CA300097E526 /* BatchingWithTimeoutScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */; };
@@ -188,6 +189,7 @@
 		96DADF572EAFCE6D00B56CE6 /* BugsnagPerformanceSpan+Internal.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "BugsnagPerformanceSpan+Internal.h"; sourceTree = "<group>"; };
 		96F129342DCE0CFE00A6FB2B /* ManualSpanWithRemoteContextParentScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManualSpanWithRemoteContextParentScenario.swift; sourceTree = "<group>"; };
 		96F5268B2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManualNetworkSpanCallbackSetToNilScenario.swift; sourceTree = "<group>"; };
+		96F901122EE81E580026F5B9 /* BackgroundThreadStartScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BackgroundThreadStartScenario.swift; sourceTree = "<group>"; };
 		96F901162EE836CC0026F5B9 /* ManualParentBlockedSpanScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManualParentBlockedSpanScenario.swift; sourceTree = "<group>"; };
 		96F901082EE7B7FF0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AutoInstrumentNetworkEarlyCallbackScenario.swift; sourceTree = "<group>"; };
 		CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BatchingWithTimeoutScenario.swift; sourceTree = "<group>"; };
@@ -321,6 +323,7 @@
 				9657A8982A3CF75B001CEF5D /* AutoInstrumentTabViewLoadScenario.swift */,
 				0185C47128F6C983006F9BDC /* AutoInstrumentViewLoadScenario.swift */,
 				CB572EAC29BB829800FD7A2A /* BackgroundForegroundScenario.swift */,
+				96F901122EE81E580026F5B9 /* BackgroundThreadStartScenario.swift */,
 				CBAAE2582912601D006D4AA0 /* BatchingScenario.swift */,
 				CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */,
 				09301DC02B63A65A000A7C12 /* ComplexViewScenario.swift */,
@@ -540,6 +543,7 @@
 				CB572EAD29BB829800FD7A2A /* BackgroundForegroundScenario.swift in Sources */,
 				966634E02C9DE384004A934D /* FrameMetricsSlowFramesScenario.swift in Sources */,
 				CB2B8A9F2A0E80B80054FBBE /* AutoInstrumentNetworkBadAddressScenario.swift in Sources */,
+				96F901132EE81E580026F5B9 /* BackgroundThreadStartScenario.swift in Sources */,
 				DA58B7D62DF87EC500CB80A4 /* PluginInstallErrorScenario.swift in Sources */,
 				09F025152BAC50EC007D9F73 /* ViewDidLoadDoesntTriggerScenario.swift in Sources */,
 				0988B5372CAD32C500D131B1 /* InfraCheckNoBugsnagScenario.swift in Sources */,

features/fixtures/ios/FixtureXcFramework.xcodeproj/project.pbxproj

@@ -80,6 +80,7 @@
 		96E0B34B2CD0E21C008AEB9C /* AutoInstrumentNetworkSharedSessionInvalidateScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96E0B34A2CD0E21C008AEB9C /* AutoInstrumentNetworkSharedSessionInvalidateScenario.swift */; };
 		96F129332DCE0CDD00A6FB2B /* RenderingMetricsScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F129322DCE0CDD00A6FB2B /* RenderingMetricsScenario.swift */; };
 		96F5268C2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F5268B2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift */; };
+		96F901152EE81E6D0026F5B9 /* BackgroundThreadStartScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F901142EE81E6D0026F5B9 /* BackgroundThreadStartScenario.swift */; };
 		96F901192EE836E10026F5B9 /* ManualParentBlockedSpanScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F901182EE836E10026F5B9 /* ManualParentBlockedSpanScenario.swift */; };
 		96F9010B2EE7B81F0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96F9010A2EE7B81F0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift */; };
 		CB0496942913CA300097E526 /* BatchingWithTimeoutScenario.swift in Sources */ = {isa = PBXBuildFile; fileRef = CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */; };
@@ -203,6 +204,7 @@
 		96E0B34A2CD0E21C008AEB9C /* AutoInstrumentNetworkSharedSessionInvalidateScenario.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AutoInstrumentNetworkSharedSessionInvalidateScenario.swift; sourceTree = "<group>"; };
 		96F129322DCE0CDD00A6FB2B /* RenderingMetricsScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RenderingMetricsScenario.swift; sourceTree = "<group>"; };
 		96F5268B2C259E4E0095D600 /* ManualNetworkSpanCallbackSetToNilScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManualNetworkSpanCallbackSetToNilScenario.swift; sourceTree = "<group>"; };
+		96F901142EE81E6D0026F5B9 /* BackgroundThreadStartScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BackgroundThreadStartScenario.swift; sourceTree = "<group>"; };
 		96F901182EE836E10026F5B9 /* ManualParentBlockedSpanScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManualParentBlockedSpanScenario.swift; sourceTree = "<group>"; };
 		96F9010A2EE7B81F0026F5B9 /* AutoInstrumentNetworkEarlyCallbackScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AutoInstrumentNetworkEarlyCallbackScenario.swift; sourceTree = "<group>"; };
 		CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BatchingWithTimeoutScenario.swift; sourceTree = "<group>"; };
@@ -339,6 +341,7 @@
 				9657A8982A3CF75B001CEF5D /* AutoInstrumentTabViewLoadScenario.swift */,
 				0185C47128F6C983006F9BDC /* AutoInstrumentViewLoadScenario.swift */,
 				CB572EAC29BB829800FD7A2A /* BackgroundForegroundScenario.swift */,
+				96F901142EE81E6D0026F5B9 /* BackgroundThreadStartScenario.swift */,
 				CBAAE2582912601D006D4AA0 /* BatchingScenario.swift */,
 				CB0496932913CA300097E526 /* BatchingWithTimeoutScenario.swift */,
 				09301DC02B63A65A000A7C12 /* ComplexViewScenario.swift */,
@@ -537,6 +540,7 @@
 				96F901192EE836E10026F5B9 /* ManualParentBlockedSpanScenario.swift in Sources */,
 				9691A9E12CA7588700707CDF /* FrameMetricsNonFirstClassSpanInstrumentRenderingOnScenario.swift in Sources */,
 				09F3F52C2D6C72BD00BAA0A3 /* MemoryMetricsScenario.swift in Sources */,
+				96F901152EE81E6D0026F5B9 /* BackgroundThreadStartScenario.swift in Sources */,
 				09637A3F2B06082200F4F776 /* Logging.m in Sources */,
 				CB3477182901481F0033759C /* AutoInstrumentNetworkWithParentScenario.swift in Sources */,
 				091B95742CA18F66007DC8A9 /* AutoInstrumentNetworkPreStartDisabledScenario.swift in Sources */,

features/fixtures/ios/Scenarios/BackgroundThreadStartScenario.swift

@@ -0,0 +1,35 @@
+//
+//  BackgroundThreadStartScenario.swift
+//  Fixture
+//
+//  Created by Robert Bartoszewski on 09/12/2025.
+//
+
+import BugsnagPerformance
+
+@objcMembers
+class BackgroundThreadStartScenario: Scenario {
+    
+    override func setInitialBugsnagConfiguration() {
+        super.setInitialBugsnagConfiguration()
+        
+        // Ensure the batch doesn't get full, as we want the spans to be delivered due to reaching work interval
+        bugsnagPerfConfig.internal.autoTriggerExportOnBatchSize = 100
+        bugsnagPerfConfig.internal.performWorkInterval = 5.0
+    }
+    
+    override func startBugsnag() {
+        BugsnagPerformance.startSpan(name: "BackgroundThreadStartScenarioEarlySpan").end()
+        DispatchQueue
+            .global(qos: .background)
+            .asyncAfter(deadline: .now() + 2.0) {
+            super.startBugsnag()
+        }
+    }
+
+    override func run() {
+        DispatchQueue.main.asyncAfter(deadline: .now() + 3.0) {
+            BugsnagPerformance.startSpan(name: "BackgroundThreadStartScenarioSpan").end()
+        }
+    }
+}