refactor: calculate labelAngle upfront (avoid repeated calculation)
refactor: calculate labelAngle upfront (avoid repeated calculation)

uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite