fix(web): timeline stuttering with many assets in 1 day (#28509)

* fix(web): timeline stuttering with many assets in 1 day

* cache isInOrNearViewport per day

* skip inOrNearViewport check on first run
This commit is contained in:
Ben Beckford
2026-05-24 14:03:46 -07:00
committed by GitHub
parent 3b34c53092
commit 9733fa4872
2 changed files with 14 additions and 3 deletions
@@ -1,6 +1,5 @@
<script lang="ts">
import type { TimelineAsset } from '$lib/managers/timeline-manager/types';
import { filterIsInOrNearViewport } from '$lib/managers/timeline-manager/utils.svelte';
import type { ViewerAsset } from '$lib/managers/timeline-manager/viewer-asset.svelte';
import type { VirtualScrollManager } from '$lib/managers/VirtualScrollManager/VirtualScrollManager.svelte';
import { uploadAssetsStore } from '$lib/stores/upload';
@@ -31,11 +30,14 @@
const transitionDuration = $derived(manager.suspendTransitions && !$isUploading ? 0 : 150);
const scaleDuration = $derived(transitionDuration === 0 ? 0 : transitionDuration + 100);
const firstInOrNearViewport = $derived(viewerAssets.findIndex((a) => a.isInOrNearViewport));
const lastInOrNearViewport = $derived(viewerAssets.findLastIndex((a) => a.isInOrNearViewport));
</script>
<!-- Image grid -->
<div data-image-grid class="relative overflow-clip" style:height={height + 'px'} style:width={width + 'px'}>
{#each filterIsInOrNearViewport(viewerAssets) as viewerAsset (viewerAsset.id)}
{#each viewerAssets.slice(firstInOrNearViewport, lastInOrNearViewport + 1) as viewerAsset (viewerAsset.id)}
{@const position = viewerAsset.position!}
{@const asset = viewerAsset.asset!}
@@ -17,13 +17,13 @@ export class TimelineDay {
height = $state(0);
width = $state(0);
isInOrNearViewport = $derived.by(() => this.viewerAssets.some((viewAsset) => viewAsset.isInOrNearViewport));
#top: number = $state(0);
#start: number = $state(0);
#row = $state(0);
#col = $state(0);
#deferredLayout = false;
#lastInOrNearViewport = -1;
constructor(timelineMonth: TimelineMonth, index: number, day: number, groupTitle: string, orderBy: AssetOrderBy) {
this.index = index;
@@ -154,4 +154,13 @@ export class TimelineDay {
get absoluteTimelineDayTop() {
return this.timelineMonth.top + this.#top;
}
get isInOrNearViewport() {
if (this.#lastInOrNearViewport !== -1 && this.viewerAssets[this.#lastInOrNearViewport].isInOrNearViewport) {
return true;
}
this.#lastInOrNearViewport = this.viewerAssets.findIndex((viewAsset) => viewAsset.isInOrNearViewport);
return this.#lastInOrNearViewport !== -1;
}
}