```
Bloat for example serial_echo
File  .text Size         Crate Name
0.1%  47.4% 328B   serial_echo serial_echo::__cortex_m_rt_main
0.0%  18.5% 128B stm32f0xx_hal <stm32f0xx_hal::serial::Error as core::fmt::Debug>::fmt
0.0%  13.3%  92B           std core::fmt::builders::DebugTuple::finish
0.0%   9.8%  68B   cortex_m_rt Reset
0.0%   1.4%  10B           std core::option::expect_none_failed
0.0%   1.4%  10B           std core::panicking::panic_fmt
0.0%   1.4%  10B     [Unknown] main
0.0%   0.9%   6B      cortex_m __primask
0.0%   0.6%   4B      cortex_m __cpsie
0.0%   0.6%   4B      cortex_m __cpsid
0.0%   0.3%   2B   cortex_m_rt HardFault_
0.0%   0.3%   2B    panic_halt rust_begin_unwind
0.0%   0.3%   2B   cortex_m_rt DefaultPreInit
0.0%   0.3%   2B   cortex_m_rt DefaultHandler_
0.0%   0.3%   2B           std core::ptr::drop_in_place
0.0%   0.0%   0B               And 0 smaller methods. Use -n N to show more.
0.3% 100.0% 692B               .text section size, the file size is 250.6KiB
```