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F1 iconPerformance

Games that run inefficiently, such as those with heavy CPU usage or excessive memory allocation leading to frequent garbage collection pauses, may receive reduced visibility in user timelines/feeds.

Caching Actors​

Caching frequently created actors is often necessary to prevent garbage collection pauses.

For example, the tetris game example uses a cache to store the tetrominoes instead of creating a new entity/Actor each time a new tetromino/piece is spawned:

const cache = new Map<string, Piece>();

const getPiece = (type: PieceType) => {
    const existing = cache.get(type.name);
    if (existing) {
        existing.reset(); // reset to clean/initial state
        return existing;
    }
    const piece = new Piece(type);
    cache.set(type.name, piece);
    return piece;
};

// ...

function spawn() {
    const randomPieceType = random.pickOne(PIECE_TYPES);
    const piece = getPiece(randomPieceType);
    // ...
}

See Also​