第一个回调调用非常快,其余的延迟约50毫秒(非累加),我不知道为什么。publicclassCfTest{finalstaticlongt0=System.nanoTime();publicstaticvoidmain(String[]args){CompletableFuturecf1=CompletableFuture.supplyAsync(()->{sleep(2000);return100;});CompletableFuturecf2=CompletableFuture.supplyAsync(()->{sleep(1000);return1L;});Completable