Heatmap chart is not showing properly for large data points - highcharts

Question

I want to show the heatmap chart but for the large data points chart is not coming correctly. I have 36 categories [for now, it can be more] on X-axis and Y-axis and according to this, I have generated the heatmap chart.
Please refer this fiddle:
Highcharts.chart('container', {
chart: {
type: 'heatmap',
marginTop: 30,
marginBottom: 80,
plotBorderWidth: 1
},
title: {
text: 'Sales per employee per weekday'
},
xAxis: {
categories: ["offer", "Brand Launch Sale", "Women's wear", "Brand", "Weekday bonanza offer", "Women's ddd", "Home fashion sae", "Women fff", "Fashion fiesta offer", "Fashion", "Weekday", "Fashion fies", "Local", "Home le", "Weekdayfff", "Women jena", "Week off", "Women's jewlly", "Brand Launch", "Local brand", "Fashion bazaa", "Women gadf", "Weekend look", "Home fashion avtar", "Weekend ohhh", "Week log", "Local phinomy", "Weekend dhamaka", "Fashionghanae", "Weekday dhamaka", "Womejnfv", "Brandrr Sale", "Demo", "defe", "Otherc", "c3"]
},
yAxis: {
categories: ["offer", "Brand Launch Sale", "Women's wear", "Brand", "Weekday bonanza offer", "Women's ddd", "Home fashion sae", "Women fff", "Fashion fiesta offer", "Fashion", "Weekday", "Fashion fies", "Local", "Home le", "Weekdayfff", "Women jena", "Week off", "Women's jewlly", "Brand Launch", "Local brand", "Fashion bazaa", "Women gadf", "Weekend look", "Home fashion avtar", "Weekend ohhh", "Week log", "Local phinomy", "Weekend dhamaka", "Fashionghanae", "Weekday dhamaka", "Womejnfv", "Brandrr Sale", "Demo", "defe", "Otherc", "c3"],
title: null
},
colorAxis: {
min: 0,
minColor: '#FFFFFF',
maxColor: Highcharts.getOptions().colors[0]
},
legend: {
align: 'right',
layout: 'vertical',
margin: 0,
verticalAlign: 'top',
y: 55,
symbolHeight: 280
},
tooltip: {
formatter: function () {
return '<b>' + this.series.xAxis.categories[this.point.x] + '</b> sold <br><b>' +
this.point.value + '</b> items on <br><b>' + this.series.yAxis.categories[this.point.y] + '</b>';
}
},
series: [{
name: 'Sales per employee',
borderWidth: 1,
data: 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<script src="https://code.highcharts.com/modules/heatmap.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<div id="container" style="height: 800px; min-width: 510px; max-width: 800px; margin: 0 auto"></div>

Answer 1

That issue is caused by turboThreshold property. You need to increase it:
series: [{
turboThreshold: 9e9,
...
}]
Live demo: http://jsfiddle.net/BlackLabel/1vxm7eou/
API Reference: https://api.highcharts.com/highcharts/series.heatmap.turboThreshold