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Optimistic Next Edit Suggestions #222
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avarayr
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hey @ulugbekna, i'd appreciate your [& other code owners] insight on this. There are some kinks to iron out, but in my testing, this massively improves the UX of NES. some points for discussion: Optimistic NES will multiply the number of NES requests by 3, which may affect the rate limit/user allowance. |
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@avarayr Thanks for the PR! We'll take a detailed look. We are also working on additional approaches to improve the experience while keeping the number of requests in check. (E.g., microsoft/vscode#255727 and microsoft/vscode#255728.) |
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- Add prefetch chain mechanism that triggers when edits are shown - Prefetch up to 3 edits deep to reduce latency for sequential edits - Integrate with existing NextEditCache infrastructure - Track active prefetches to avoid duplicates - Clean up resources on disposal
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Basis: Tab, Tab, Tab — Objects in motion want to stay in motion.
Summary
This PR implements optimistic prefetching for next edit suggestions, eliminating delay between accepting an edit and receiving the next suggestion by assuming that user will keep pressing tab to accept sequential edits.
Problem
Currently, when users accept an inline edit suggestion, there's a noticeable delay
before the next suggestion appears. This breaks the flow of rapid sequential edits.
Solution
Implement predictive fetching that anticipates user behavior based on the "objects in
motion stay in motion" principle. When a NES is shown, the system
immediately fetches the next edit in the background, assuming the user will continue
accepting suggestions.
All existing tests continue to pass.
Performance
Discussion
Optimistic NES will multiply the number of NES requests by 3, which may affect the rate limit/user allowance.