You can define event handlers (functions) that need to be executed before the application starts up, or when the application is shutting down.

These functions can be declared with `async def` or normal `def`.

### `startup` event { #startup-event }

To add a function that should be run before the application starts, declare it with the event `"startup"`:

   *
   * Prior to OkHttp 3.3.1 we accepted either form and consider them equivalent. And since OkHttp
   * 3.7.0 this is also true. But OkHttp 3.3.1 through 3.6.0 treated these as different.
   */
  @Test
  fun forJavaName_fromLegacyEnumName() {
    // These would have been considered equal in OkHttp 3.3.1, but now aren't.
    assertThat(forJavaName("SSL_RSA_EXPORT_WITH_RC4_40_MD5"))

 *
 * @author Kevin Bourrillion
 * @author Jesse Wilson
 * @author Austin Appleby
 */
@GwtCompatible
final class Hashing {
  private Hashing() {}

  /*
   * These should be ints, but we need to use longs to force GWT to do the multiplications with
   * enough precision.
   */
  private static final long C1 = 0xcc9e2d51;
  private static final long C2 = 0x1b873593;

  /*

 */
class PacConstantsTest {

    /**
     * Tests that the constant values in the PacConstants interface match their expected values.
     * This prevents accidental modification of these critical constants.
     */
    @Test
    void testConstantValues() {
        // Verify the PAC version
        assertEquals(0, PacConstants.PAC_VERSION, "PAC_VERSION should be 0");

        // Verify PAC buffer types

"thr" = "thr"
"toi" = "toi"

[type.go]
extend-ignore-identifiers-re = [
    # Variants of `typ` used to mean `type` in golang as it is otherwise a
    # keyword - some of these (like typ1 -> type1) can be fixed, but probably
    # not worth the effort.
    "[tT]yp[0-9]*",

* `summary`: A short summary of the API.
* `description`: The description of your API, this can include markdown and will be shown in the docs.
* `routes`: A list of routes, these are each of the registered *path operations*. They are taken from `app.routes`.

/// info

The parameter `summary` is available in OpenAPI 3.1.0 and above, supported by FastAPI 0.99.0 and above.

///

//msgp:tuple dataUsageEntryV2
type dataUsageEntryV2 struct {
	// These fields do no include any children.
	Size     int64
	Objects  uint64
	ObjSizes sizeHistogram
	Children dataUsageHashMap
}

//msgp:tuple dataUsageEntryV3
type dataUsageEntryV3 struct {
	// These fields do no include any children.
	Size     int64
	Objects  uint64
	ObjSizes sizeHistogram

Write throughput is typically at least 500MB/s per CPU core,
and scales with the number of available CPU cores.
Decompression speed is typically at least 1GB/s.

This means that in cases where raw IO is below these numbers
compression will not only reduce disk usage but also help increase system throughput.
Typically, enabling compression on spinning disk systems
will increase speed when the content can be compressed.

## Get Started

If you don't want to have those optional dependencies, you can instead install `pip install fastapi`.

If you want to install the standard dependencies but without the `fastapi-cloud-cli`, you can install with `pip install "fastapi[standard-no-fastapi-cloud-cli]"`.

///

## Advanced User Guide { #advanced-user-guide }

## Version 5.0.0-alpha.13

_2024-04-16_

 *  Breaking: Tag unstable new APIs as `@ExperimentalOkHttpApi`. We intend to release OkHttp 5.0
    without stabilizing these new APIs first.

    Do not use these experimental APIs in modules that may be executed using a version of OkHttp
    different from the version that the module was compiled with. Do not use them in published