Properties reload costs a lot

[24kpure]

spring-cloud-zookeeper/spring-cloud-zookeeper-config/src/main/java/org/springframework/cloud/zookeeper/config/ConfigWatcher.java

Line 113 in 90fac58

TreeCacheEvent.Type eventType = event.getType();

if we have large number of configurations and a config is updated ， all application nodes will pull the full configuration , which is too expensive.
Shall we add a cache with listener?