lbry-desktop/ui/component/channelContent/index.js
jessopb a3398843c2
Optimize selectClaimIsMine (#7370)
Frequently used; top in perf profile

Most of the time, you already have the claim object in the current context. `selectClaimIsMineForUri` will retrieve the claim again, which is wasteful, even if it is memoized (looking up the cache still takes time).

Break apart the logic and added the alternative `selectClaimIsMine` for faster lookup.

Co-authored-by: infinite-persistence <inf.persistence@gmail.com>
2021-12-31 12:52:26 -05:00

42 lines
1.6 KiB
JavaScript

import { connect } from 'react-redux';
import { PAGE_SIZE } from 'constants/claim';
import {
makeSelectClaimsInChannelForPage,
makeSelectFetchingChannelClaims,
selectClaimIsMine,
makeSelectTotalPagesInChannelSearch,
selectClaimForUri,
} from 'redux/selectors/claims';
import { doResolveUris } from 'redux/actions/claims';
import * as SETTINGS from 'constants/settings';
import { makeSelectChannelIsMuted } from 'redux/selectors/blocked';
import { withRouter } from 'react-router';
import { selectUserVerifiedEmail } from 'redux/selectors/user';
import { makeSelectClientSetting, selectShowMatureContent } from 'redux/selectors/settings';
import ChannelContent from './view';
const select = (state, props) => {
const { search } = props.location;
const urlParams = new URLSearchParams(search);
const page = urlParams.get('page') || 0;
const claim = props.uri && selectClaimForUri(state, props.uri);
return {
pageOfClaimsInChannel: makeSelectClaimsInChannelForPage(props.uri, page)(state),
fetching: makeSelectFetchingChannelClaims(props.uri)(state),
totalPages: makeSelectTotalPagesInChannelSearch(props.uri, PAGE_SIZE)(state),
channelIsMine: selectClaimIsMine(state, claim),
channelIsBlocked: makeSelectChannelIsMuted(props.uri)(state),
claim,
isAuthenticated: selectUserVerifiedEmail(state),
showMature: selectShowMatureContent(state),
tileLayout: makeSelectClientSetting(SETTINGS.TILE_LAYOUT)(state),
};
};
const perform = (dispatch) => ({
doResolveUris: (uris, returnCachedUris) => dispatch(doResolveUris(uris, returnCachedUris)),
});
export default withRouter(connect(select, perform)(ChannelContent));