最近将我的 Macbook 升级到 Catalina OS v10.15.1，此后在 Xcode (11.2.1) 中遇到了模拟器的性能问题。
确切地说，模拟器工作正常，但我的 Macbook 风扇在启动模拟器后立即开始运转，然后笔记本电脑开始变得非常热。随后是来自进程searchd的崩溃报告（如下）。根据活动监视器（也在下面） ，进程Launchd_sim也占用了大量的 CPU 处理。
奇怪的是，模拟器工作正常，但 Macbook 风扇运行异常高并且非常热。在去 Catalina OS 之前我没有这个问题。
退出模拟器时，风扇减速至正常速度，机器似乎冷却下来。这种情况是可以重复的。其他人看到这个问题吗？
模拟器版本为 11.2.1（SimulatorApp-912.4 SimulatorKit-570.3 CoreSimulator-681.15）。
来自控制台的崩溃报告：
Process: searchd [11382]
Path: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/Search.framework/searchd
Identifier: searchd
Version: 2073.1
Code Type: X86-64 (Native)
Parent Process: launchd_sim [11219]
Responsible: SimulatorTrampoline [1176]
User ID: 501
Date/Time: 2019-12-15 10:37:31.277 +0100
OS Version: Mac OS X 10.15.1 (19B88)
Report Version: 12
Anonymous UUID: 19B5ACA8-D061-41E2-1CD0-65EBEB8D3499
Sleep/Wake UUID: 44265181-901D-4D25-AF95-C778F4B5F151
Time Awake Since Boot: 30000 seconds
Time Since Wake: 1800 seconds
System Integrity Protection: enabled
Crashed Thread: 1 Dispatch queue: com.apple.metadata.spotlightindex.Flush scheduler for index at /Users/jeffs_itunes/Library/Developer/CoreSimulator/Devices/4B8D
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000200000010
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [11382]
VM Regions Near 0x200000010:
__LINKEDIT 000000010d769000-000000010d7a1000 [ 224K] r--/r-- SM=COW /usr/lib/dyld
-->
STACK GUARD 0000700006f23000-0000700006f24000 [ 4K] ---/rwx SM=NUL stack guard for thread 1
Application Specific Information:
CoreSimulator 681.15 - Device: iPhone 8 (4B8DA2C2-A685-4076-8B21-3FF303DDEFC5) - Runtime: iOS 13.2 (17B102) - DeviceType: iPhone 8
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff51b54166 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff51b546cc mach_msg + 60
2 com.apple.CoreFoundation 0x00007fff23bb1aa5 __CFRunLoopServiceMachPort + 197
3 com.apple.CoreFoundation 0x00007fff23bac7c7 __CFRunLoopRun + 1671
4 com.apple.CoreFoundation 0x00007fff23babe16 CFRunLoopRunSpecific + 438
5 com.apple.Foundation 0x00007fff2574b87f -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 211
6 searchd 0x000000010169ed5a 0x101692000 + 52570
7 libdyld.dylib 0x00007fff51a1dc25 start + 1
Thread 1 Crashed:: Dispatch queue: com.apple.metadata.spotlightindex.Flush scheduler for index at /Users/jeffs_itunes/Library/Developer/CoreSimulator/Devices/4B8D
0 libsystem_platform.dylib 0x00007fff51bf6732 _platform_strlen + 18
1 libsystem_c.dylib 0x00007fff51ac73f2 strdup + 18
2 com.apple.spotlight.SpotlightDaemon 0x00007fff44086956 SDTransactionDone + 17
3 com.apple.spotlight.SpotlightDaemon 0x00007fff4405c964 syncFinished + 36
4 com.apple.mobilespotlight.index 0x00007fff3c8c4ed9 delayed_op_final + 15
5 com.apple.mobilespotlight.index 0x00007fff3c8bd05f flush_runLoop + 105
6 com.apple.mobilespotlight.index 0x00007fff3c910547 work_fun + 634
7 libdispatch.dylib 0x00007fff519eb265 _dispatch_block_async_invoke2 + 83
8 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
9 libdispatch.dylib 0x00007fff519e4526 _dispatch_lane_serial_drain + 707
10 libdispatch.dylib 0x00007fff519e4f93 _dispatch_lane_invoke + 443
11 libdispatch.dylib 0x00007fff519e4394 _dispatch_lane_serial_drain + 305
12 libdispatch.dylib 0x00007fff519e4f93 _dispatch_lane_invoke + 443
13 libdispatch.dylib 0x00007fff519e5e90 _dispatch_workloop_invoke + 992
14 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
15 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
16 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 2:: Dispatch queue: com.apple.searchd.createEncryptedRankingBackupQueue
0 libsystem_kernel.dylib 0x00007fff51b56a16 __ulock_wait + 10
1 libdispatch.dylib 0x00007fff519defb4 _dlock_wait + 44
2 libdispatch.dylib 0x00007fff519df23f _dispatch_group_wait_slow + 43
3 searchd 0x00000001016adeb8 0x101692000 + 114360
4 libdispatch.dylib 0x00007fff519dd848 _dispatch_call_block_and_release + 12
5 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
6 libdispatch.dylib 0x00007fff519e466d _dispatch_lane_serial_drain + 1034
7 libdispatch.dylib 0x00007fff519e4f5c _dispatch_lane_invoke + 388
8 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
9 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
10 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 3:: Dispatch queue: com.apple.searchd.application.localization.updates
0 libxpc.dylib 0x00007fff51c3ebfd xpc_data_create + 1
1 libxpc.dylib 0x00007fff51c4189b xpc_dictionary_set_data + 27
2 libsystem_trace.dylib 0x00007fff51c1aff5 _os_activity_stream_entry_encode + 1002
3 libsystem_trace.dylib 0x00007fff51c1aa3b _os_activity_stream_reflect + 312
4 libsystem_trace.dylib 0x00007fff51c26399 _os_log_impl_stream + 564
5 libsystem_trace.dylib 0x00007fff51c2590f _os_log_impl_flatten_and_send + 6347
6 libsystem_trace.dylib 0x00007fff51c24035 _os_log + 162
7 libsystem_trace.dylib 0x00007fff51c26923 _os_log_impl + 9
8 com.apple.CoreSpotlight 0x00007fff24f5c4b7 __initEntitlements_block_invoke + 406
9 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff519df9e5 _dispatch_once_callout + 20
11 com.apple.CoreSpotlight 0x00007fff24f5c95a hasInternalCSEntitlement + 40
12 com.apple.CoreServices 0x00007fff24f20014 -[CSSearchableItem setExpirationDate:] + 40
13 com.apple.CoreServices 0x00007fff24f1f0e9 -[CSSearchableItem initWithUniqueIdentifier:domainIdentifier:attributeSet:] + 399
14 searchd 0x00000001016f17f7 0x101692000 + 391159
15 searchd 0x00000001016f3720 0x101692000 + 399136
16 libdispatch.dylib 0x00007fff519dd848 _dispatch_call_block_and_release + 12
17 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
18 libdispatch.dylib 0x00007fff519e4526 _dispatch_lane_serial_drain + 707
19 libdispatch.dylib 0x00007fff519e4f93 _dispatch_lane_invoke + 443
20 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
21 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
22 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 4:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 5:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 6:: Dispatch queue: PKPlugIn start (com.apple.FileProvider.FPSpotlightIndexer)
0 libsystem_kernel.dylib 0x00007fff51b56a16 __ulock_wait + 10
1 libsystem_platform.dylib 0x00007fff51bf7c8b _os_unfair_lock_lock_slow + 160
2 libxpc.dylib 0x00007fff51c46c06 _xpc_uncork_domain + 73
3 com.apple.pluginkit.framework 0x00007fff41ab43b0 0x7fff41ab1000 + 13232
4 libdispatch.dylib 0x00007fff519dd848 _dispatch_call_block_and_release + 12
5 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
6 libdispatch.dylib 0x00007fff519e4526 _dispatch_lane_serial_drain + 707
7 libdispatch.dylib 0x00007fff519e4f5c _dispatch_lane_invoke + 388
8 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
9 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
10 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 7:: Dispatch queue: Set Attributes scheduler for spindle 0
0 libsystem_kernel.dylib 0x00007fff51b55c22 kevent_id + 10
1 libdispatch.dylib 0x00007fff519fae29 _dispatch_kq_poll + 242
2 libdispatch.dylib 0x00007fff519faa2e _dispatch_kq_drain + 146
3 libdispatch.dylib 0x00007fff519fa943 _dispatch_event_loop_drain + 307
4 libdispatch.dylib 0x00007fff519e5d19 _dispatch_workloop_invoke + 617
5 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
6 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
7 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 8:
0 libsystem_kernel.dylib 0x00007fff51b54166 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff51b546cc mach_msg + 60
2 com.apple.mobilespotlight.index 0x00007fff3c9d4e0c _handleExceptions + 114
3 libsystem_pthread.dylib 0x00007fff51c04d36 _pthread_start + 125
4 libsystem_pthread.dylib 0x00007fff51c0158f thread_start + 15
Thread 9:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 10:: Dispatch queue: com.apple.searchd.workq
0 libsystem_kernel.dylib 0x00007fff51b54166 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff51b546cc mach_msg + 60
2 libsystem_notify.dylib 0x00007fff51bf15ab notify_check + 290
3 com.apple.CoreServices 0x00007fff24e1e5d4 _LSDatabaseNotificationCheck() + 132
4 com.apple.CoreServices 0x00007fff24e1bf7d _LSDatabaseNeedsUpdate(_LSDatabase*) + 53
5 com.apple.CoreServices 0x00007fff24e1b19d _LSContextInitReturningError + 293
6 com.apple.CoreServices 0x00007fff24e1b8a1 _LSContextInit + 49
7 com.apple.CoreServices 0x00007fff24df3b81 +[LSApplicationProxy applicationProxyForBundleType:identifier:isCompanion:URL:itemID:bundleUnit:] + 201
8 com.apple.CoreServices 0x00007fff24df3f37 +[LSApplicationProxy applicationProxyForIdentifier:] + 32
9 searchd 0x00000001016dea37 0x101692000 + 313911
10 libdispatch.dylib 0x00007fff519dd848 _dispatch_call_block_and_release + 12
11 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
12 libdispatch.dylib 0x00007fff519e4526 _dispatch_lane_serial_drain + 707
13 libdispatch.dylib 0x00007fff519e4f93 _dispatch_lane_invoke + 443
14 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
15 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
16 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 11:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 12:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 13:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 14:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 15:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 16:: Dispatch queue: PKPlugIn start (com.apple.eventkitui.spotlight)
0 libsystem_kernel.dylib 0x00007fff51b54166 mach_msg_trap + 10
1 libsystem_kernel.dylib 0x00007fff51b546cc mach_msg + 60
2 libxpc.dylib 0x00007fff51c4ca35 _xpc_pipe_routine + 348
3 libxpc.dylib 0x00007fff51c4cc04 xpc_pipe_routine_with_flags + 49
4 libxpc.dylib 0x00007fff51c35cc1 _xpc_interface_routine + 169
5 libxpc.dylib 0x00007fff51c46b97 _xpc_bootstrap_services + 115
6 libxpc.dylib 0x00007fff51c46ee3 _xpc_uncork_domain + 806
7 com.apple.pluginkit.framework 0x00007fff41ab43b0 0x7fff41ab1000 + 13232
8 libdispatch.dylib 0x00007fff519dd848 _dispatch_call_block_and_release + 12
9 libdispatch.dylib 0x00007fff519de7b9 _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff519e4526 _dispatch_lane_serial_drain + 707
11 libdispatch.dylib 0x00007fff519e4f5c _dispatch_lane_invoke + 388
12 libdispatch.dylib 0x00007fff519eeff9 _dispatch_workloop_worker_thread + 626
13 libsystem_pthread.dylib 0x00007fff51c0171b _pthread_wqthread + 290
14 libsystem_pthread.dylib 0x00007fff51c0157b start_wqthread + 15
Thread 17:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 18:
0 libsystem_pthread.dylib 0x00007fff51c0156c start_wqthread + 0
Thread 1 crashed with X86 Thread State (64-bit):
rax: 0x00000000519df1c0 rbx: 0x00007ff1f1540650 rcx: 0x0000000200000013 rdx: 0x0000000200000013
rdi: 0x0000000200000010 rsi: 0x0000000000000000 rbp: 0x0000700006fa3450 rsp: 0x0000700006fa3450
r8: 0x0000003000000000 r9: 0x0060000000000000 r10: 0xfffffff700000000 r11: 0x0000000700000000
r12: 0x00007ff1f15152c0 r13: 0x00007fff842cf120 r14: 0x0000000200000013 r15: 0x0000000200000002
rip: 0x00007fff51bf6732 rfl: 0x0000000000010202 cr2: 0x000000010a779a93
Logical CPU: 0
Error Code: 0x02000177
Trap Number: 133
External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 2345146
thread_create: 0
thread_set_state: 426
VM Region Summary:
ReadOnly portion of Libraries: Total=588.9M resident=0K(0%) swapped_out_or_unallocated=588.9M(100%)
Writable regions: Total=144.6M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=144.6M(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
=========== ======= =======
Activity Tracing 256K 1
Dispatch continuations 12.0M 12
Kernel Alloc Once 8K 1
MALLOC 110.8M 74
MALLOC guard page 48K 12
Memory Tag 241 16K 2
Memory Tag 243 384K 2
Memory Tag 244 3328K 7
Memory Tag 250 96K 2
STACK GUARD 56.1M 19
Stack 17.1M 20
VM_ALLOCATE 200K 1
__DATA 9962K 356
__DATA_CONST 39.5M 349
__DATA_DIRTY 10K 10
__FONT_DATA 4K 1
__LINKEDIT 290.3M 4
__OBJC_RO 42.7M 1
__OBJC_RW 2128K 1
__TEXT 298.6M 359
__UNICODE 564K 1
mapped file 134.7M 147
shared memory 24K 3
=========== ======= =======
TOTAL 1.0G 1385
