CPU利用率100%，响应延迟15秒左右 #504
Description
操作系统：Budgie
Linux: 6.8.0-55-generic
ibus: 1.5.29-rc2
键盘：HHKB Professional Hybrid Type-S
我们家住着一只叫Alfie的阿比西尼亚猫，他喜欢在键盘上展示舞姿。
由此，我发现键盘变得卡顿，使用top观察，显示ibus-engine-lib进程的CPU利用率为100%；
期间系统平均负载为1.x；
另外用perf记录系统的函数统计信息，如下：
- 99.99% 0.00% ibus-engine-lib ibus-engine-libpinyin [.] _start ◆
- 99.99% 0.00% ibus-engine-lib libc.so.6 [.] __libc_start_main@@GLIBC_2.34 ▒
- 99.99% 0.00% ibus-engine-lib libc.so.6 [.] __libc_start_call_main ▒
- 99.99% 0.00% ibus-engine-lib ibus-engine-libpinyin [.] main ▒
- 99.99% 0.00% ibus-engine-lib libibus-1.0.so.5.0.529 [.] ibus_main ▒
- 99.99% 0.00% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] g_main_loop_run ▒
- 99.99% 0.00% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] 0x00007cbc00401717 ▒
- 99.99% 0.00% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] 0x00007cbc003a248e ▒
- 99.99% 0.00% ibus-engine-lib libgio-2.0.so.0.8000.0 [.] 0x00007cbc005febe8 ▒
- 99.99% 0.00% ibus-engine-lib libibus-1.0.so.5.0.529 [.] 0x00007cbc007f2f7c ▒
- 99.99% 0.00% ibus-engine-lib libgobject-2.0.so.0.8000.0 [.] g_signal_emit ▒
- 99.99% 0.00% ibus-engine-lib libgobject-2.0.so.0.8000.0 [.] g_signal_emit_valist ▒
- 99.99% 0.00% ibus-engine-lib libgobject-2.0.so.0.8000.0 [.] 0x00007cbc004c2ef2 ▒
- 99.99% 0.00% ibus-engine-lib libgobject-2.0.so.0.8000.0 [.] 0x00007cbc004d2f98 ▒
- 99.99% 0.00% ibus-engine-lib libgobject-2.0.so.0.8000.0 [.] g_closure_invoke ▒
- 99.99% 0.00% ibus-engine-lib libibus-1.0.so.5.0.529 [.] 0x00007cbc007db8d8 ▒
- 99.99% 0.00% ibus-engine-lib ibus-engine-libpinyin [.] PY::PinyinEngine::processKeyEvent(unsigned int, unsigned int, unsigned▒
- 99.99% 0.00% ibus-engine-lib ibus-engine-libpinyin [.] PY::FullPinyinEditor::insert(int) ▒
- 99.99% 0.00% ibus-engine-lib ibus-engine-libpinyin [.] PY::PhoneticEditor::update() ▒
- 99.99% 0.00% ibus-engine-lib libpinyin.so.15.0.0 [.] pinyin_guess_candidates ▒
- 99.99% 0.00% ibus-engine-lib libpinyin.so.15.0.0 [.] 0x00007cbc008ccc86 ▒
- 99.99% 0.00% ibus-engine-lib libpinyin.so.15.0.0 [.] 0x00007cbc008cca39 ▒
- 32.61% 0.00% ibus-engine-lib libpinyin.so.15.0.0 [.] 0x00007cbc008cca05 ▒
- 31.64% 0.00% ibus-engine-lib libpinyin.so.15.0.0 [.] 0x00007cbc008cca51 ▒
- 28.77% 9.91% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] g_array_set_size ▒
- 25.45% 12.74% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] g_array_append_vals ▒
- 15.21% 12.29% ibus-engine-lib libc.so.6 [.] __memset_avx2_unaligned_erms ▒
- 14.87% 12.49% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] g_array_remove_range ▒
- 5.98% 2.90% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] memset@plt ▒
- 5.24% 4.16% ibus-engine-lib libc.so.6 [.] __memmove_avx_unaligned_erms ▒
- 3.18% 1.08% ibus-engine-lib libglib-2.0.so.0.8000.0 [.] memcpy@plt ▒
- 2.18% 1.20% ibus-engine-lib libpinyin.so.15.0.0 [.] g_array_append_vals@plt ▒
- 1.86% 0.91% ibus-engine-lib libpinyin.so.15.0.0 [.] g_array_set_size@plt
如果需要perf文件，我可以提供。
另外，维护人员如果能养一只猫的话（因为开发的是ibus），我想应该能更有机会触发一些出人意料的异常。