Details about Pre-Buffer

[XenoZLH]

ablation 3.2.1中的Pre-Buffer对performance影响特别大，能否详细解释一下设计和计算流程？tech report原文比较简略

[lixiaotong97]

Due to space limitations, we didn’t detail it in the report, but you can refer to the open-source modeling file here: https://huggingface.co/meituan-longcat/LongCat-Next/blob/main/modular_longcat_next_visual.py#L522. Also, this module is only considered for current stage and will be removed after further validation in larger pre-training experiments.