std::optional<int64_t> compile_threshold;
  if (compile_mode == DeviceCompileMode::kLazy) {
    compile_threshold = kDefaultCompilationThreshold;
  } else if (compile_mode == DeviceCompileMode::kAsync) {
    compile_threshold = 0;  // for now, always compile right away.
  }

  if (compile_mode == DeviceCompileMode::kStrict) {
    // Lazy compilation is disabled.
    return true;
  }

namespace tensorflow {
// The number of compiler threads to use for asynchronous device compilation.
inline constexpr int64_t kNumAsyncDeviceCompilerThreads = 10;

enum class DeviceCompileMode {
  kLazy,
  kStrict,
  kAsync,
};

enum class DeviceCompileState {
  kUncompiled,
  kCompiling,
  kCompiled,
};

// Creates a single-node graph using the specified `node_def` as the only op

  NameAttrList fn;
  fn.set_name("foo");

  // Using a mock here to determine when the async compilation finishes. This is
  // to avoid using absl::SleepFor().
  // `RegisterCompilation` is the last call that happens just before the async
  // compilation completes. We use the completion of this call to determine when
  // the compilation finshes to verify expected behavior.

  // Explicitly capture all required data by value for async compilation.
  // Update compilation state in cache.
  cache_->Store(signature, DeviceCompileState::kCompiling, std::nullopt,
                std::nullopt, std::nullopt);
  profiler->IncrementOngoingAsyncCompilations();
  // Don't move the above code into the thread function as it synchronously
  // updates the async compilation state!

  }
  DeviceCompileMode compile_mode = [&] {
    if (must_compile_) {
      return DeviceCompileMode::kStrict;
    }
    return GetXlaOpsCommonFlags()->tf_xla_async_compilation
               ? DeviceCompileMode::kAsync
               : DeviceCompileMode::kLazy;
  }();

  bool use_pjrt =
      GetXlaOpsCommonFlags()
          ->tf_xla_use_device_api.IsEnabledInXlaCompileAndRunForDevice(

```Python hl_lines="2-3"
@app.get('/burgers')
async def read_burgers():
    burgers = await get_burgers(2)
    return burgers
```

### More technical details

You might have noticed that `await` can only be used inside of functions defined with `async def`.

```Python hl_lines="2 3"
@app.get('/burgers')
async def read_burgers():
    burgers = await get_burgers(2)
    return burgers
```

### Mais detalhes técnicos

Você deve ter observado que `await` pode ser usado somente dentro de funções definidas com `async def`.

```

В этом случае *функции обработки пути* необходимо объявлять с использованием синтаксиса `async def`:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

!!! note
    `await` можно использовать только внутри функций, объявленных с использованием `async def`.

---

Если вы обращаетесь к сторонней библиотеке, которая с чем-то взаимодействует

`await` in yalnızca `async def` ile tanımlanan fonksıyonların içinde kullanılabileceğini fark etmişsinizdir.

Ama aynı zamanda, `async def` ile tanımlanan fonksiyonların "await" ile beklenmesi gerekir. Bu nedenle, "`async def` içeren fonksiyonlar yalnızca "`async def` ile tanımlanan fonksiyonların içinde çağrılabilir.


Yani yumurta mı tavukdan, tavuk mu yumurtadan gibi ilk `async` fonksiyonu nasıl çağırılır?

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

!!! note "Nota"
    Solo puedes usar `await` dentro de funciones creadas con `async def`.

---