perf: scope message equality check to content+parts instead of full object#842
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MaheshtheDev merged 1 commit intosupermemoryai:mainfrom Apr 12, 2026
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Summary
JSON.stringify(entireMessage)with targeted field comparisons inareUIMessageArraysEqualcontentstring directly (O(n) on string length, no allocation)JSON.stringify(parts)only skips metadata fields (createdAt,annotations,experimental_attachments) that never change during streamingWhy
areUIMessageArraysEqualis called on every message state update during chat streaming. Serializing the entireUIMessageobject (including all metadata) on every comparison is expensive especially for messages with large tool invocations.@MaheshtheDev please have a look