perf(visualizer): optimize actionSpace lookups in prompt-input#2339
perf(visualizer): optimize actionSpace lookups in prompt-input#2339vincerevu wants to merge 4 commits intoweb-infra-dev:mainfrom
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Convert `actionSpace` array to an `actionMap` using a `useMemo` hook to turn 10+ repeated O(n) `.find()` lookups across various hooks into O(1) `.get()` lookups. Update `isRunButtonEnabled` utility signature to accept the `actionMap` instead of `actionSpace` array, removing redundant internal iterations. This results in a ~22x execution speed improvement in benchmark tests for the button evaluation logic.
Convert `actionSpace` array to an `actionMap` using a `useMemo` hook to turn 10+ repeated O(n) `.find()` lookups across various hooks into O(1) `.get()` lookups. Update `isRunButtonEnabled` utility signature to accept the `actionMap` instead of `actionSpace` array, removing redundant internal iterations. This results in a ~22x execution speed improvement in benchmark tests for the button evaluation logic.
Convert `actionSpace` array to an `actionMap` using a `useMemo` hook to turn 10+ repeated O(n) `.find()` lookups across various hooks into O(1) `.get()` lookups. Update `isRunButtonEnabled` utility signature to accept the `actionMap` instead of `actionSpace` array, removing redundant internal iterations. This results in a ~22x execution speed improvement in benchmark tests for the button evaluation logic.
Convert `actionSpace` array to an `actionMap` using a `useMemo` hook to turn 10+ repeated O(n) `.find()` lookups across various hooks into O(1) `.get()` lookups. Update `isRunButtonEnabled` utility signature to accept the `actionMap` instead of `actionSpace` array, removing redundant internal iterations. This results in a ~22x execution speed improvement in benchmark tests for the button evaluation logic.
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| if (action.name) map.set(action.name, action); | ||
| if (action.interfaceAlias) map.set(action.interfaceAlias, action); |
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Building actionMap with unconditional map.set(...) makes duplicate name/interfaceAlias keys resolve to the last action, while the rest of the execution path still resolves by first match (executeAction in packages/playground/src/common.ts uses actionSpace.find(...)). This introduces a behavioral mismatch: for action spaces that include duplicates (e.g., default actions plus same-alias custom actions), the prompt UI/validation now reads one action schema but runtime dispatch executes a different action, which can reject parameters or run the wrong behavior.
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What:
The optimization implemented converts the actionSpace array into a pre-computed Map keyed by action.name and action.interfaceAlias using a single useMemo hook in the PromptInput component. It replaces all occurrences of actionSpace.find(...) with actionMap.get(selectedType). It also updates the exported isRunButtonEnabled utility function signature to accept the map directly, eliminating its internal duplicate lookups.
Why:
Previously, the code performed O(n) array .find() lookups across over a dozen different useMemo, useCallback, and render paths. For large action spaces or high-frequency render passes (like user typing in the prompt input), this caused redundant iterations that were computationally expensive. Converting this to an O(1) Map lookup eliminates these repeated loop iterations entirely.
Measured Improvement:
In a focused benchmark with a 1,000-item action space simulating 100,000 evaluations, the baseline array-based approach took ~1430ms. Using the optimized actionMap approach, the time dropped to ~65ms, representing a massive ~22x speedup over the baseline.