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Slice the comments before filtering to avoid going through everything.

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For the case of livestreams, the comments are added incrementally via websocket. The selector returns everything, which grows as a user watches the livestream.

We could even make it a bit more efficient by passing in `maxCount` to `filterComments`, and do a `for` loop there, but decided to keep things readable by not changing the `filter` usage.
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infinite-persistence 2021-11-17 16:05:50 +08:00
parent 5204bb366e
commit 91f1f588e6
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1 changed files with 5 additions and 2 deletions
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7
ui/redux/selectors/comments.js
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@ -214,8 +214,11 @@ export const selectTopLevelCommentsForUri = createCachedSelector(
...Object.values(filterCommentsDepOnList),
(uri, maxCount = -1, byClaimId, claimId, ...filterInputs) => {
const comments = byClaimId && byClaimId[claimId];
const filtered = filterComments(comments, claimId, filterInputs);
return maxCount > 0 ? filtered.slice(0, maxCount) : filtered;
if (comments) {
return filterComments(maxCount > 0 ? comments.slice(0, maxCount) : comments, claimId, filterInputs);
} else {
return [];
}
}
)((state, uri, maxCount = -1) => `${String(uri)}:${maxCount}`);