On the issue of LineChartView stuttering

## What did you do?

Hello, I ran through your project and discovered an issue:
In the demo of Line Chart, I drag the first slider to the maximum value of 1500, and then set
"set1.mode=LineChartModeHorizontalBezier".

## What did you expect to happen?

After zooming in and moving, the chart will become too laggy

## What happened instead?

After zooming in and moving, the chart will become too laggy

## DGCharts Environment

**DGCharts version/Branch/Commit Number:**
**Xcode version:** 14.3
**Swift version:**
**Platform(s) running DGCharts:**
**macOS version running Xcode:**

## Demo Project

ℹ Please link to or upload a project we can download that reproduces the issue.

Reproduce the issue in the demo's Line Chart by moving the first slider to 1500, zooming, and using set1.mode=LineChartModeHorizontalBezier. Start at LineChartView and trace the interaction path; done means the same zoom-and-move scenario no longer becomes excessively laggy.

Written by the indexing model from the issue text.