Group transition animation lagging

[tabupl]

Hey, I created a line chart with Skia, which holds 2 lines with gradient below them and ref lines.
The Group component holidng these elements is animated inside of the canvas with PanGesture. The thing is, that it's lagging if I have more data points (1440 datapoints is the max I use at the moment).

So I tried to understand why it's lagging, but can't find the reason behind this. This is the part of the code responsible for animation:

  const chartX = useSharedValue(0);
  const chartTransform = useDerivedValue(() => [{ translateX: chartX.value }]);
  
  const handleGestureEvent = (e: PanGestureHandlerEventPayload) => {
	  const velocityChartXValue = chartX.value + e.velocityX * SWIPE_ANIMATION_VELOCITY_MULTIPLIER;
	  const chartXAfterAnimation = clamp(Math.round(velocityChartXValue), 0, canvasShift);
  
          chartX.value = withTiming(chartXAfterAnimation, {
	          duration: 1000,
	          easing: Easing.out(Easing.poly(4)),
          });
  };
  
  const onPanGesture = Gesture.Pan().onChange(handleGestureEvent)
  
  
  return <>
  ...
  <GestureDetector gesture={onPanGesture}>
      <Canvas
	      style={{
		      width: 2 * chartWidth,
		      height: chartHeight,
		      left: -canvasShift,
		      }}
      >
	      <Group transform={chartTransform}>
  ...
              </Group>
      </Canvas>
  </GestureDetector>
  </>

While checking this, I noticed a few things:

• With less data points there is no lag (or it's smaller)
• If I remove some components from the group, the lag also gets smaller.
• If I remove withTiming and just set chartX value directly with user swiping, there is also no lag.
• Nothing inside of Group rerenders during the animation (which meanst that the animation IS actually running on UI thread).
• Also the whole chart component doesn't rerender during the Pan swiping animation.
• If I redice withTiming duration, the lag gets smaller.

I'm trying to understand where does the lag come from or how I can get rid of it. Do you have any ideas? If everything runs on UI thread, it probably shouldn't happen, no matter how many data points I have or how many components are drawn inside of Group, since they are not rerendered or redrawn while swiping.