Is caching a memory leak?

[Tsukihime]

RPG Maker implements caching to speed up image loading.
If you look at the ImageManager, you can see it in action

ImageManager.loadNormalBitmap = function(path, hue) {
    var key = path + ':' + hue;
    if (!this._cache[key]) {
        var bitmap = Bitmap.load(path);
        bitmap.addLoadListener(function() {
            bitmap.rotateHue(hue);
        });
        this._cache[key] = bitmap;
    }
    return this._cache[key];
};

However, I don't believe this cache is ever cleared out.
Will this become a problem?

 

[HotfireLegend]

The cache should be used to access data RECENTLY accessed, not all data over time, so yes that is a leak.

 

[eivl]

ImageManager.clear = function() {
    this._cache = {};
};

Is the clear cache method never called?

 

[Tsukihime]

ImageManager.clear = function() {
    this._cache = {};
};

Is the clear cache method never called?

No.

 

[eivl]

ImageManager.loadBitmap = function(folder, filename, hue, smooth) {
    if (filename) {
        var path = folder + encodeURIComponent(filename) + '.png';
        var bitmap = this.loadNormalBitmap(path, hue || 0);
        bitmap.smooth = smooth;
        this.clear();
        return bitmap;
    } else {
        return this.loadEmptyBitmap();
    }
};

i think you can test this, not sure how far ImageManager goes.