[Bug] RandomLoadBalance optimize the same weight judgement

[mengle-yang]

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Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

Dubbo java 3.2, Open-JDK 1.8, Windows

Steps to reproduce this issue

we judge if the weight is same after accumulation. It will cause us to do an additional addition operation. We can move the logic to determine if the weights are the same before accumulation. So we can reduce addition operation.

What you expected to happen

We don't need to do an additional operation. It reduces performance

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• [X] Yes I am willing to submit a pull request on my own!

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