The append-only AST trick that makes Flutter AI chat actually smooth

— flutter_markdown re-parses the entire response string on every streamed token. The fix is an append-only AST with monotonic node IDs used as Flutter widget keys. I packaged it as streamdown — a drop-in replacement that's 188× faster on chunked input and produces zero visible flicker. Live on pub.d

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AiFeed24 Team·⏱ 1 min read·Cloud & DevOps

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The append-only AST trick that makes Flutter AI chat actually smooth

Deep Analysis

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The append-only AST trick that makes Flutter AI chat actually smooth

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