在ARM芯片上,使用std::vector 的 at()时,用 try catch 捕获异常,会导致性能降低或者 crash 吗? 示例代码: int main() { std::vector data = {1, 2, 4, 5, 5, 6}; // Set element 1 data.at(1) = 88; // Read element 2 std::cout << "Element at index 2 has value " << data.at(2) << '\n'; std::cout << "data size = " << data.size() << '\n'; try { // Set element 6, where the index is determined at runtime data.at(runtime_six()) = 666; } catch (std::out_of_range const& exc) { std::cout << exc.what() << '\n'; } return 0; } 线下长时间自测无法复现(性能降低、crash),但是线上会低概率偶现 crash(从堆栈无法分析到原因,如果去掉 try catch 则不会 crash)。