#
# Changes the behavior in pycpp.sh from "run all tests" to "verify that all
# tests can compile." Used in some CI jobs (macOS and Linux Arm64) where test
# execution is too expensive.
TFCI_PYCPP_SWAP_TO_BUILD_ENABLE=1

Blocking APIs may be inefficient because you hold a thread idle while waiting on the network. Threads are expensive because they have both a memory overhead and a context-switching overhead.

#### Framed protocols

   * [logCloseableLeak].
   */
  open fun getStackTraceForCloseable(closer: String): Any? {
    return when {
      logger.isLoggable(Level.FINE) -> Throwable(closer) // These are expensive to allocate.
      else -> null
    }
  }

  open fun logCloseableLeak(
    message: String,
    stackTrace: Any?,
  ) {
    var logMessage = message
    if (stackTrace == null) {

   * canceled. For example, happy-path events like [requestHeadersStart] and [requestHeadersEnd] may
   * occur after a call is canceled. Typically cancellation takes effect when an expensive I/O
   * operation is required.
   *
   * This is invoked at most once, even if [Call.cancel] is invoked multiple times. It may be
   * invoked at any point in a call's life, including before [callStart] and after [callEnd].

Before Let's Encrypt, these **HTTPS certificates** were sold by trusted third parties.

The process to acquire one of these certificates used to be cumbersome, require quite some paperwork and the certificates were quite expensive.

But then **<a href="https://letsencrypt.org/" class="external-link" target="_blank">Let's Encrypt</a>** was created.

We create an async function `lifespan()` with `yield` like this:

```Python hl_lines="16  19"
{!../../../docs_src/events/tutorial003.py!}
```

  // `handSize` must be no larger than `queues`, and should be
  // significantly smaller (so that a few heavy flows do not
  // saturate most of the queues).  See the user-facing
  // documentation for more extensive guidance on setting this
  // field.  This field has a default value of 8.
  // +optional
  optional int32 handSize = 2;

  // `queueLengthLimit` is the maximum number of requests allowed to

  // `handSize` must be no larger than `queues`, and should be
  // significantly smaller (so that a few heavy flows do not
  // saturate most of the queues).  See the user-facing
  // documentation for more extensive guidance on setting this
  // field.  This field has a default value of 8.
  // +optional
  optional int32 handSize = 2;

  // `queueLengthLimit` is the maximum number of requests allowed to

  // +optional
  map<string, string> selector = 2;

  // targetSelector is the label selector for pods that should match the replicas count. This is a serializated
  // version of both map-based and more expressive set-based selectors. This is done to
  // avoid introspection in the clients. The string will be in the same format as the
  // query-param syntax. If the target type only supports map-based selectors, both this

* A pod’s Quality of Service Class is now available in its Status.
* Upgrade cAdvisor library to v0.25.0. Notable changes include,
  - Container filesystem usage tracking disabled for device mapper due to excessive
    IOPS.
  - Ignore `.mount` cgroups, fixing disappearing stats.
* A new field `terminationMessagePolicy` has been added to containers that allows