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ui: Flamegraph rendering improvements #6117
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8504c53
Flamegraph rendering improvements
manojVivek 47ce66d
[pre-commit.ci lite] apply automatic fixes
pre-commit-ci-lite[bot] b402008
Linter fixes
manojVivek 7d8444d
Merge remote-tracking branch 'origin/flamegraph-improvements' into fl…
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84 changes: 84 additions & 0 deletions
84
ui/packages/shared/profile/src/ProfileFlameGraph/FlameGraphArrow/useBatchedRendering.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // Copyright 2022 The Parca Authors | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
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| import {useEffect, useRef, useState} from 'react'; | ||
|
|
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| interface UseBatchedRenderingOptions { | ||
| batchSize?: number; | ||
| // Delay between batches in ms (0 = next animation frame) | ||
| batchDelay?: number; | ||
| } | ||
|
|
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| interface UseBatchedRenderingResult<T> { | ||
| items: T[]; | ||
| isComplete: boolean; | ||
| } | ||
|
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| // useBatchedRendering - Helps in incrementally rendering items in batches to avoid UI blocking. | ||
| export const useBatchedRendering = <T>( | ||
| items: T[], | ||
| options: UseBatchedRenderingOptions = {} | ||
| ): UseBatchedRenderingResult<T> => { | ||
| const {batchSize = 500, batchDelay = 0} = options; | ||
|
|
||
| const [renderedCount, setRenderedCount] = useState(0); | ||
| const itemsRef = useRef(items); | ||
| const rafRef = useRef<number | null>(null); | ||
| const timeoutRef = useRef<NodeJS.Timeout | null>(null); | ||
|
|
||
| useEffect(() => { | ||
| if (itemsRef.current !== items) { | ||
| itemsRef.current = items; | ||
| setRenderedCount(prev => { | ||
| if (items.length === 0) return 0; | ||
| // If new items were added (scrolling down), keep current progress | ||
| if (items.length > prev) return prev; | ||
| // If items reduced, cap to new length | ||
| return Math.min(prev, items.length); | ||
| }); | ||
| } | ||
| }, [items]); | ||
|
|
||
| // Progressively render more items | ||
| useEffect(() => { | ||
| if (renderedCount === items.length) { | ||
| return; | ||
| } | ||
|
|
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| const scheduleNextBatch = (): void => { | ||
| const incrementState = (): void => { | ||
| setRenderedCount(prev => Math.min(prev + batchSize, items.length)); | ||
| }; | ||
| if (batchDelay > 0) { | ||
| timeoutRef.current = setTimeout(incrementState, batchDelay); | ||
| } else { | ||
| rafRef.current = requestAnimationFrame(incrementState); | ||
| } | ||
| }; | ||
| scheduleNextBatch(); | ||
|
|
||
| return () => { | ||
| if (rafRef.current !== null) { | ||
| cancelAnimationFrame(rafRef.current); | ||
| } | ||
| if (timeoutRef.current !== null) { | ||
| clearTimeout(timeoutRef.current); | ||
| } | ||
| }; | ||
| }, [renderedCount, items.length, batchSize, batchDelay]); | ||
|
|
||
| return { | ||
| items: items.slice(0, renderedCount), | ||
| isComplete: renderedCount === items.length, | ||
| }; | ||
| }; |
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Very cool!