src/main/java/io/reactivex/Flowable.java
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> onBackpressureDrop() {
        return RxJavaPlugins.onAssembly(new FlowableOnBackpressureDrop<T>(this));
    }
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> onBackpressureDrop() {
        return RxJavaPlugins.onAssembly(new FlowableOnBackpressureDrop<T>(this));
    }
@ CheckReturnValue @ BackpressureSupport ( BackpressureKind . UNBOUNDED_IN ) @ SchedulerSupport ( SchedulerSupport . NONE ) public final Flowable < T > onBackpressureDrop ( ) { return RxJavaPlugins . onAssembly ( new FlowableOnBackpressureDrop < T > ( this ) ) ; }
Instructs a Publisher that is emitting items faster than its Subscriber can consume them to discard,
rather than emit, those items that its Subscriber is not prepared to observe.
<p>
<img width="640" height="245" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/bp.obp.drop.png" alt="">
<p>
If the downstream request count hits 0 then the Publisher will refrain from calling {@code onNext} until
the Subscriber invokes {@code request(n)} again to increase the request count.
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The operator honors backpressure from downstream and consumes the source {@code Publisher} in an unbounded
manner (i.e., not applying backpressure to it).</dd>
<dt><b>Scheduler:</b></dt>
<dd>{@code onBackpressureDrop} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@return the source Publisher modified to drop {@code onNext} notifications on overflow
@see <a href="http://reactivex.io/documentation/operators/backpressure.html">ReactiveX operators documentation: backpressure operators</a>
Instructs a Publisher that is emitting items faster than its Subscriber can consume them to discard rather than emit those items that its Subscriber is not prepared to observe . <p > <img width = 640 height = 245 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / bp . obp . drop . png alt = > <p > If the downstream request count hits 0 then the Publisher will refrain from calling { @code onNext } until the Subscriber invokes { @code request ( n ) } again to increase the request count . <dl > <dt > <b > Backpressure : < / b > < / dt > <dd > The operator honors backpressure from downstream and consumes the source { @code Publisher } in an unbounded manner ( i . e . not applying backpressure to it ) . < / dd > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code onBackpressureDrop } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >