Speed issue

[topDev15]

I'm trying to change color of shape using following code:
@discardableResult public func replaceColors(node: Node, color: Fill?) -> Bool {
if let shape = node as? Shape {
shape.fill = color
return true
}
return false
}

At that moment, following code will be called:

group.contentsVar.onChange { [weak self] _ in
self?.updateRenderers()
}

private func updateRenderers() {
renderers.forEach { $0.dispose() }
renderers.removeAll()

    if let updatedRenderers = group?.contents.compactMap ({ child -> NodeRenderer? in
        guard let interval = renderingInterval else {
            print("setNeedsDisplay=6-2")
            return RenderUtils.createNodeRenderer(child, view: view, animationCache: animationCache)
        }

        let index = AnimationUtils.absoluteIndex(child, useCache: true)
        if index > interval.from && index < interval.to {
            print("setNeedsDisplay=6-3")
            return RenderUtils.createNodeRenderer(child, view: view, animationCache: animationCache, interval: interval)
        }

        return .none

    }) {
        renderers = updatedRenderers
    }
}

Btw when the color of shape is changed, updateRenderers() will be called much time.
It lowered the speed of the app.
How can we call updateRenderers() only once for changed shape?