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Merge pull request #4787 from matrix-org/travis/room-list/performance-2

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Improve room switching in the new room list
This commit is contained in:
Travis Ralston 2020-06-18 07:46:03 -06:00 committed by GitHub
commit 87aece9997
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4 changed files with 84 additions and 36 deletions
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18
src/stores/room-list/algorithms/Algorithm.ts
View file

@ -508,16 +508,14 @@ export class Algorithm extends EventEmitter {
return true;
}
if (cause === RoomUpdateCause.NewRoom) {
// TODO: Be smarter and insert rather than regen the planet.
await this.setKnownRooms([room, ...this.rooms]);
return true;
}
if (cause === RoomUpdateCause.RoomRemoved) {
// TODO: Be smarter and splice rather than regen the planet.
await this.setKnownRooms(this.rooms.filter(r => r !== room));
return true;
// If the update is for a room change which might be the sticky room, prevent it. We
// need to make sure that the causes (NewRoom and RoomRemoved) are still triggered though
// as the sticky room relies on this.
if (cause !== RoomUpdateCause.NewRoom && cause !== RoomUpdateCause.RoomRemoved) {
if (this.stickyRoom === room) {
console.warn(`[RoomListDebug] Received ${cause} update for sticky room ${room.roomId} - ignoring`);
return false;
}
}
let tags = this.roomIdsToTags[room.roomId];

87
src/stores/room-list/algorithms/list-ordering/ImportanceAlgorithm.ts
View file

@ -87,7 +87,7 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
public constructor(tagId: TagID, initialSortingAlgorithm: SortAlgorithm) {
super(tagId, initialSortingAlgorithm);
console.log("Constructed an ImportanceAlgorithm");
console.log(`[RoomListDebug] Constructed an ImportanceAlgorithm for ${tagId}`);
}
// noinspection JSMethodCanBeStatic
@ -151,8 +151,36 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
}
}
private async handleSplice(room: Room, cause: RoomUpdateCause): Promise<boolean> {
if (cause === RoomUpdateCause.NewRoom) {
const category = this.getRoomCategory(room);
this.alterCategoryPositionBy(category, 1, this.indices);
this.cachedOrderedRooms.splice(this.indices[category], 0, room); // splice in the new room (pre-adjusted)
} else if (cause === RoomUpdateCause.RoomRemoved) {
const roomIdx = this.getRoomIndex(room);
if (roomIdx === -1) return false; // no change
const oldCategory = this.getCategoryFromIndices(roomIdx, this.indices);
this.alterCategoryPositionBy(oldCategory, -1, this.indices);
this.cachedOrderedRooms.splice(roomIdx, 1); // remove the room
} else {
throw new Error(`Unhandled splice: ${cause}`);
}
}
private getRoomIndex(room: Room): number {
let roomIdx = this.cachedOrderedRooms.indexOf(room);
if (roomIdx === -1) { // can only happen if the js-sdk's store goes sideways.
console.warn(`Degrading performance to find missing room in "${this.tagId}": ${room.roomId}`);
roomIdx = this.cachedOrderedRooms.findIndex(r => r.roomId === room.roomId);
}
return roomIdx;
}
public async handleRoomUpdate(room: Room, cause: RoomUpdateCause): Promise<boolean> {
// TODO: Handle NewRoom and RoomRemoved
if (cause === RoomUpdateCause.NewRoom || cause === RoomUpdateCause.RoomRemoved) {
return this.handleSplice(room, cause);
}
if (cause !== RoomUpdateCause.Timeline && cause !== RoomUpdateCause.ReadReceipt) {
throw new Error(`Unsupported update cause: ${cause}`);
}
@ -162,11 +190,7 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
return; // Nothing to do here.
}
let roomIdx = this.cachedOrderedRooms.indexOf(room);
if (roomIdx === -1) { // can only happen if the js-sdk's store goes sideways.
console.warn(`Degrading performance to find missing room in "${this.tagId}": ${room.roomId}`);
roomIdx = this.cachedOrderedRooms.findIndex(r => r.roomId === room.roomId);
}
const roomIdx = this.getRoomIndex(room);
if (roomIdx === -1) {
throw new Error(`Room ${room.roomId} has no index in ${this.tagId}`);
}
@ -188,12 +212,18 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
// room from the array.
}
// The room received an update, so take out the slice and sort it. This should be relatively
// quick because the room is inserted at the top of the category, and most popular sorting
// algorithms will deal with trying to keep the active room at the top/start of the category.
// For the few algorithms that will have to move the thing quite far (alphabetic with a Z room
// for example), the list should already be sorted well enough that it can rip through the
// array and slot the changed room in quickly.
// Sort the category now that we've dumped the room in
await this.sortCategory(category);
return true; // change made
}
private async sortCategory(category: Category) {
// This should be relatively quick because the room is usually inserted at the top of the
// category, and most popular sorting algorithms will deal with trying to keep the active
// room at the top/start of the category. For the few algorithms that will have to move the
// thing quite far (alphabetic with a Z room for example), the list should already be sorted
// well enough that it can rip through the array and slot the changed room in quickly.
const nextCategoryStartIdx = category === CATEGORY_ORDER[CATEGORY_ORDER.length - 1]
? Number.MAX_SAFE_INTEGER
: this.indices[CATEGORY_ORDER[CATEGORY_ORDER.indexOf(category) + 1]];
@ -202,8 +232,6 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
const unsortedSlice = this.cachedOrderedRooms.splice(startIdx, numSort);
const sorted = await sortRoomsWithAlgorithm(unsortedSlice, this.tagId, this.sortingAlgorithm);
this.cachedOrderedRooms.splice(startIdx, 0, ...sorted);
return true; // change made
}
// noinspection JSMethodCanBeStatic
@ -230,14 +258,29 @@ export class ImportanceAlgorithm extends OrderingAlgorithm {
// We also need to update subsequent categories as they'll all shift by nRooms, so we
// loop over the order to achieve that.
for (let i = CATEGORY_ORDER.indexOf(fromCategory) + 1; i < CATEGORY_ORDER.length; i++) {
const nextCategory = CATEGORY_ORDER[i];
indices[nextCategory] -= nRooms;
}
this.alterCategoryPositionBy(fromCategory, -nRooms, indices);
this.alterCategoryPositionBy(toCategory, +nRooms, indices);
}
for (let i = CATEGORY_ORDER.indexOf(toCategory) + 1; i < CATEGORY_ORDER.length; i++) {
const nextCategory = CATEGORY_ORDER[i];
indices[nextCategory] += nRooms;
private alterCategoryPositionBy(category: Category, n: number, indices: ICategoryIndex) {
// Note: when we alter a category's index, we actually have to modify the ones following
// the target and not the target itself.
// XXX: If this ever actually gets more than one room passed to it, it'll need more index
// handling. For instance, if 45 rooms are removed from the middle of a 50 room list, the
// index for the categories will be way off.
const nextOrderIndex = CATEGORY_ORDER.indexOf(category) + 1
if (n > 0) {
for (let i = nextOrderIndex; i < CATEGORY_ORDER.length; i++) {
const nextCategory = CATEGORY_ORDER[i];
indices[nextCategory] += Math.abs(n);
}
} else if (n < 0) {
for (let i = nextOrderIndex; i < CATEGORY_ORDER.length; i++) {
const nextCategory = CATEGORY_ORDER[i];
indices[nextCategory] -= Math.abs(n);
}
}
// Do a quick check to see if we've completely broken the index

14
src/stores/room-list/algorithms/list-ordering/NaturalAlgorithm.ts
View file

@ -28,7 +28,7 @@ export class NaturalAlgorithm extends OrderingAlgorithm {
public constructor(tagId: TagID, initialSortingAlgorithm: SortAlgorithm) {
super(tagId, initialSortingAlgorithm);
console.log("Constructed a NaturalAlgorithm");
console.log(`[RoomListDebug] Constructed a NaturalAlgorithm for ${tagId}`);
}
public async setRooms(rooms: Room[]): Promise<any> {
@ -36,11 +36,19 @@ export class NaturalAlgorithm extends OrderingAlgorithm {
}
public async handleRoomUpdate(room, cause): Promise<boolean> {
// TODO: Handle NewRoom and RoomRemoved
if (cause !== RoomUpdateCause.Timeline && cause !== RoomUpdateCause.ReadReceipt) {
const isSplice = cause === RoomUpdateCause.NewRoom || cause === RoomUpdateCause.RoomRemoved;
const isInPlace = cause === RoomUpdateCause.Timeline || cause === RoomUpdateCause.ReadReceipt;
if (!isSplice && !isInPlace) {
throw new Error(`Unsupported update cause: ${cause}`);
}
if (cause === RoomUpdateCause.NewRoom) {
this.cachedOrderedRooms.push(room);
} else if (cause === RoomUpdateCause.RoomRemoved) {
const idx = this.cachedOrderedRooms.indexOf(room);
if (idx >= 0) this.cachedOrderedRooms.splice(idx, 1);
}
// TODO: Optimize this to avoid useless operations
// For example, we can skip updates to alphabetic (sometimes) and manually ordered tags
this.cachedOrderedRooms = await sortRoomsWithAlgorithm(this.cachedOrderedRooms, this.tagId, this.sortingAlgorithm);

1
src/stores/room-list/algorithms/list-ordering/OrderingAlgorithm.ts
View file

@ -67,6 +67,5 @@ export abstract class OrderingAlgorithm {
* @param cause The cause of the update.
* @returns True if the update requires the Algorithm to update the presentation layers.
*/
// XXX: TODO: We assume this will only ever be a position update and NOT a NewRoom or RemoveRoom change!!
public abstract handleRoomUpdate(room: Room, cause: RoomUpdateCause): Promise<boolean>;
}