[FEATURE]: Why PipelineP2PCommunication use broadcast_object but not send/recv API

[lichenlu]

Describe the feature

Why PipelineP2PCommunication use broadcast_object but not send/recv API

[imgaojun]

我把P2P部分代码改成send/recv后，速度提升了20%。希望官方可以改回send/recv

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After I changed part of the P2P code to send/recv, the speed increased by 20%. I hope the official can change it back to send/recv

[binmakeswell]

Hi @imgaojun and @lichenlu Thanks for the feedback, we are testing this. You are welcome to contribute by submitting a PR.