UIView to replace UILabel with ability to super fast change text color

UILabel+FastTextColorChange.m

@interface LabelMaskedView : UIView

@property (strong, nonatomic) UIView *maskView;
@property (assign, nonatomic) CGSize cachedIntrisincContentSize;

@end

@implementation LabelMaskedView

- (instancetype)initWitLabel:(UIView *)maskView {
    self = [super initWithFrame:maskView.frame];
    if (self) {
        maskView.layer.rasterizationScale = [UIScreen mainScreen].scale;
        maskView.layer.shouldRasterize = YES;
        _maskView = maskView;
      
        self.layer.mask = (id)self.maskView.layer;
    }
    return self;
}

- (CGSize)intrinsicContentSize {
    return self.maskView.intrinsicContentSize;
}

- (void)layoutSubviews {
    [super layoutSubviews];

    if (!CGRectEqualToRect(self.maskView.bounds, self.bounds)) {
        self.maskView.frame = self.bounds;
    }
}

- (void)setTextColor:(UIColor *)textColor {
    [super setBackgroundColor:textColor];
}

#pragma mark Forward all unrecognized selectors to mask view

- (BOOL)respondsToSelector:(SEL)aSelector {
    return [super respondsToSelector:aSelector] || [self.maskView respondsToSelector:aSelector];
}

- (id)forwardingTargetForSelector:(SEL)aSelector {
    return self.maskView;
}

@end