Cursor Migrates from Solid to React Using Agents: Perf Tradeoffs
Vjeux · x · 2026-08-17
Cursor largely completed a migration from Solid to React, utilizing coding agents to make extensive code edits (+266K/-193K lines). The primary motivation was performance and maintainability, as the team found that signal-based reactivity often led to accidental fan-out and performance pitfalls in complex apps. They argue that while Solid manages complexity for you, React requires developers to hold it, but React was the safer known quantity for their stack.
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