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doFetchModBlockedList: don't block ui thread (#7674)

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* doFetchModBlockedList: don't block ui thread

doFetchModBlockedList is blocking the ui thread.

Duplicate data in `doFetchModBlockedList::blockListsPerChannel` to about 1000. The tab is dead when function hits, about 4s after reload.

- Yield occasionally using the `setTimeout` method.
- Doing a chunk size of 1 for now so we don't have to yield the inner loop as well (seems good enough). This is just based on a relatively large blocklist size.

- Can't do `await` in a callback, so must change the `forEach` to a `for`.

* yield thread in storeList

Co-authored-by: infinite-persistence <inf.persistence@gmail.com>
This commit is contained in:
jessopb 2022-08-12 17:23:04 -04:00 committed by GitHub
parent b9be8d9f3a
commit 1c17ff5dd9
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 66 additions and 53 deletions
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43
ui/redux/actions/comments.js
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@ -1143,6 +1143,9 @@ export function doCommentModUnBlockAsModerator(commenterUri: string, creatorUri:
export function doFetchModBlockedList() {
return async (dispatch: Dispatch, getState: GetState) => {
const LOOP_CHUNK_SIZE = 1;
const yieldThread = () => new Promise((resolve) => setTimeout(resolve));
const state = getState();
const myChannels = selectMyChannelClaims(state);
if (!myChannels) {
@ -1172,7 +1175,7 @@ export function doFetchModBlockedList() {
})
)
)
.then((res) => {
.then(async (res) => {
let personalBlockList = [];
let adminBlockList = [];
let moderatorBlockList = [];
@ -1185,15 +1188,21 @@ export function doFetchModBlockedList() {
const adminTimeoutMap = {};
const moderatorTimeoutMap = {};
const blockListsPerChannel = res.map((r) => r.value);
blockListsPerChannel
.sort((a, b) => {
return 1;
})
.forEach((channelBlockLists) => {
const storeList = (fetchedList, blockedList, timeoutMap, blockedByMap) => {
const blockListsPerChannel = [];
for (let i = 0; i < res.length; ++i) {
blockListsPerChannel.push(res[i].value);
if (i % 2 === 0) {
await yieldThread();
}
}
for (let i = 0; i < blockListsPerChannel.length; ++i) {
const storeList = async (fetchedList, blockedList, timeoutMap, blockedByMap) => {
if (fetchedList) {
fetchedList.forEach((blockedChannel) => {
for (let j = 0; j < fetchedList.length; ++j) {
const blockedChannel = fetchedList[j];
if (j > 0 && i % LOOP_CHUNK_SIZE === 0) {
await yieldThread();
}
if (blockedChannel.blocked_channel_name) {
const channelUri = buildURI({
channelName: blockedChannel.blocked_channel_name,
@ -1227,24 +1236,28 @@ export function doFetchModBlockedList() {
}
}
}
});
}
}
};
const channelBlockLists = blockListsPerChannel[i];
const blocked_channels = channelBlockLists && channelBlockLists.blocked_channels;
const globally_blocked_channels = channelBlockLists && channelBlockLists.globally_blocked_channels;
const delegated_blocked_channels = channelBlockLists && channelBlockLists.delegated_blocked_channels;
storeList(blocked_channels, personalBlockList, personalTimeoutMap);
storeList(globally_blocked_channels, adminBlockList, adminTimeoutMap);
storeList(
if (i > 0 && i % LOOP_CHUNK_SIZE === 0) {
await yieldThread();
}
await storeList(blocked_channels, personalBlockList, personalTimeoutMap);
await storeList(globally_blocked_channels, adminBlockList, adminTimeoutMap);
await storeList(
delegated_blocked_channels,
moderatorBlockList,
moderatorTimeoutMap,
moderatorBlockListDelegatorsMap
);
});
}
dispatch({
type: ACTIONS.COMMENT_MODERATION_BLOCK_LIST_COMPLETED,
data: {