int newCapacity = calculateNewCapacity();
      Object[] newQueue = new Object[newCapacity];
      arraycopy(queue, 0, newQueue, 0, queue.length);
      queue = newQueue;
    }
  }

  /** Returns ~2x the old capacity if small; ~1.5x otherwise. */
  private int calculateNewCapacity() {
    int oldCapacity = queue.length;
    int newCapacity =

	b.Write(buf[0:1])
	var cap0 int
	for i := 0; i < 5<<10; i++ {
		b.Write(buf)
		b.Read(buf)
		if i == 0 {
			cap0 = b.Cap()
		}
	}
	cap1 := b.Cap()
	// (*Buffer).grow allows for 2x capacity slop before sliding,
	// so set our error threshold at 3x.
	if cap1 > cap0*3 {
		t.Errorf("buffer cap = %d; too big (grew from %d)", cap1, cap0)
	}
}

func BenchmarkWriteByte(b *testing.B) {

      int newCapacity = calculateNewCapacity();
      Object[] newQueue = new Object[newCapacity];
      arraycopy(queue, 0, newQueue, 0, queue.length);
      queue = newQueue;
    }
  }

  /** Returns ~2x the old capacity if small; ~1.5x otherwise. */
  private int calculateNewCapacity() {
    int oldCapacity = queue.length;
    int newCapacity =

![Events Diagram](../assets/images/events@2x.png)

Here’s a [sample event listener](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEventsNonConcurrent.java) that prints each event with a timestamp.

```java

.fn[i],s="card",r='[data-card-widget="card-refresh"]',d={source:"",sourceSelector:"",params:{},trigger:r,content:".card-body",loadInContent:!0,loadOnInit:!0,loadErrorTemplate:!0,responseType:"",overlayTemplate:'<div class="overlay"><i class="fas fa-2x fa-sync-alt fa-spin"></i></div>',errorTemplate:'<span class="text-danger"></span>',onLoadStart:function(){},onLoadDone:function(e){return e},onLoadFail:function(e,t,a){}},f=function(){function e(e,t){if(this._element=e,this._parent=e.parents(".card...

Unfortunately it crashes on OkHttp 4.x’s bytecode. Until [Google’s bug][advanced_profiling_bug] is
fixed you must disable advanced profiling in Android Studio.

![Disable Advanced Profiling](../assets/images/disable_advanced_profiling@2x.png)


R8 / ProGuard
-------------

R8 and ProGuard are both code optimizers for `.class` files.

R8 is the [default optimizer][r8] in Android Studio 3.4 and newer. It works well with all

![Interceptors Diagram](../assets/images/interceptors@2x.png)

### Application Interceptors

Interceptors are registered as either _application_ or _network_ interceptors. We'll use the `LoggingInterceptor` defined above to show the difference.

    Random r = new Random(9);
    for (int i = 0; i < ITERS; i++) {
      countRemaps(r.nextLong(), map);
    }
    for (int shard = 2; shard <= MAX_SHARDS; shard++) {
      // Rough: don't exceed 1.2x the expected number of remaps by more than 20
      assertThat((double) map.get(shard)).isAtMost(1.2 * ITERS / shard + 20);
    }
  }

  private void countRemaps(long h, AtomicLongMap<Integer> map) {
    int last = 0;

    server.enqueue(mockResponse)
    val responseAfter = MockResponse(body = "This comes after a busted connection")
    server.enqueue(responseAfter)
    server.enqueue(responseAfter) // Enqueue 2x because the broken connection may be reused.
    val response1 = getResponse(newRequest("/a"))
    response1.body
      .source()
      .timeout()
      .timeout(100, TimeUnit.MILLISECONDS)

sourceSelector: '',\n  params: {},\n  trigger: SELECTOR_DATA_REFRESH,\n  content: '.card-body',\n  loadInContent: true,\n  loadOnInit: true,\n  loadErrorTemplate: true,\n  responseType: '',\n  overlayTemplate: '<div class=\"overlay\"><i class=\"fas fa-2x fa-sync-alt fa-spin\"></i></div>',\n  errorTemplate: '<span class=\"text-danger\"></span>',\n  onLoadStart() {},\n  onLoadDone(response) {\n    return response\n  },\n  onLoadFail(_jqXHR, _textStatus, _errorThrown) {}\n}\n\nclass CardRefresh {\n  constructor(element,...