Is anyone having success with iteratively feeding chunks of code (or other documents) to LLM for search? I understand 'haystack' issues with LLMs are quite bad,

Is anyone having success with iteratively feeding chunks of code (or other documents) to LLM for search? I understand 'haystack' issues with LLMs are quite bad, but RAG is quite bad too and a lot of that haystack research seems to be with feeding very large contexts in.