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javascript - OpenLayers 6 bad performance vectorlayer containing polygons and linestrings

The problem occurs when I'm displaying more than 2000 polygons and/or linestrings, the map's panning and zooming gets slow, also the loading of the osm tiles gets slow. The problem is gone when there are less features visible in the viewport(zooming in or panning away from features). I don't think it's an styling issue because it also occurs with the standard openlayers styling.

Because of the code snippet's limitations I could only add a few features of the real data to the map, unfortunately the problem isn't visible with this amount of data. But maybe someone can spot something wrong with the code or has a better way of displaying lots of polygons/linestrings on a vectorlayer.

<html lang="en">
  <head>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.5.0/css/ol.css" type="text/css">
    <style>
      .map {
        height: 95vh;
        width: 100%;
      }
    </style>
    <script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.5.0/build/ol.js"></script>
    <title>OpenLayers example</title>
  </head>
  <body>
    <h2>My Map</h2>
    <div id="map" class="map"></div>
    <script type="text/javascript">
      var geoJsonData = {
    "crs": {
        "type": "name",
        "properties": {
            "name": "EPSG:28992"
        }
    },
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "geometry": {
                "type": "Polygon",
                "coordinates": [
                    [
                        [
                            685441.262918955,
                            7022605.59
                        ],
                        [
                            685441.039740355,
                            7022586.08
                        ],
                        [
                            685438.582036506,
                            7022584.54
                        ],
                        [
                            685436.865980189,
                            7022584.1
                        ],
                        [
                            685434.284371417,
                            7022583.44
                        ],
                        [
                            685434.261433221,
                            7022585.66
                        ],
                        [
                            685435.181676638,
                            7022586.01
                        ],
                        [
                            685436.736225901,
                            7022587.56
                        ],
                        [
                            685436.7100026,
                            7022588.07
                        ],
                        [
                            685436.571626044,
                            7022589.15
                        ],
                        [
                            685436.530014489,
                            7022589.94
                        ],
                        [
                            685436.323742369,
                            7022590.91
                        ],
                        [
                            685436.103124509,
                            7022592.1
                        ],
                        [
                            685435.779683307,
                            7022593.02
                        ],
                        [
                            685435.386742883,
                            7022593.68
                        ],
                        [
                            685435.074618194,
                            7022594.1
                        ],
                        [
                            685434.412768294,
                            7022594.54
                        ],
                        [
                            685433.80001363,
                            7022594.9
                        ],
                        [
                            685432.853304886,
                            7022595.19
                        ],
                        [
                            685431.872737418,
                            7022595.44
                        ],
                        [
                            685429.855558338,
                            7022595.36
                        ],
                        [
                            685429.073510219,
                            7022595.47
                        ],
                        [
                            685428.626841421,
                            7022595.77
                        ],
                        [
                            685428.399095635,
                            7022596.29
                        ],
                        [
                            685428.254838334,
                            7022596.83
                        ],
                        [
                            685428.115213326,
                            7022597.8
                        ],
                        [
                            685428.370541637,
                            7022654.54
                        ],
                        [
                            685428.382657063,
                            7022655.68
                        ],
                        [
                            685428.405020634,
                            7022656.21
                        ],
                        [
                            685428.376684955,
                            7022656.68
                        ],
                        [
                            685428.365367803,
                            7022657.18
                        ],
                        [
                            685428.005926213,
                            7022657.85
                        ],
                        [
                            685427.608527838,
                            7022658.09
                        ],
                        [
                            685425.602559711,
                            7022658.13
                        ],
                        [
                            685425.55793753,
                            7022664.88
                        ],
                        [
                            685426.897739616,
                            7022664.88
                        ],
                        [
                            685427.332560588,
                            7022665.02
                        ],
                        [
                            685427.605391799,
                            7022665.61
                        ],
                        [
                            685428.206939893,
                            7022901.65
                        ],
                        [
                            685425.646257605,
                            7022901.4
                        ],
                        [
                            685425.73507516,
                            7022909.73
                        ],
                        [
                            685428.225456642,
                            7022909.64
                        ],
                        [
                            685428.78013709,
                            7022910.08
                        ],
                        [
                            685428.937050443,
                            7022910.73
                        ],
                        [
                            685428.103531107,
                            7022956.32
                        ],
                        [
                            685441.139919701,
                            7022956.91
                        ],
                        [
                            685441.139394247,
                            7022956.39
                        ],
                        [
                            685441.523807046,
                            7022936.19
                        ],
                        [
                            685441.875336024,
                            7022920.72
                        ],
                        [
                            685441.748992747,
                            7022902.63
                        ],
                        [
                            685441.799700934,
                            7022887.07
                        ],
                        [
                            685441.678791454,
                            7022874.18
                        ],
                        [
                            685441.678177743,
                            7022853.82
                        ],
                        [
                            685441.695029443,
                            7022831.97
                        ],
                        [
                            685441.799738679,
                            7022808.98
                        ],
                        [
                            685441.509185026,
                            7022780.18
                        ],
                        [
                            685441.507866647,
                            7022747.26
                        ],
                        [
                            685441.511628204,
                            7022713.25
                        ],
                        [
                            685441.428954069,
                            7022689.88
                        ],
                        [
                            685441.289877033,
                            7022669.03
                        ],
                        [
                            685441.130931211,
                            7022647.89
                        ],
                        [
                            685441.138783873,
                            7022629.88
                        ],
                        [
                            685441.262918955,
                            7022605.59
                        ]
                    ]
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Polygon",
                "coordinates": [
                    [
                        [
                            685444.18869203,
                            7022248.82
                        ],
                        [
                            685441.789495138,
                            7022246.66
                        ],
                        [
                            685437.679498426,
                            7022246.43
                        ],
                        [
                            685437.60881564,
                            7022247.46
                        ],
                        [
                            685437.875308075,
                            7022247.45
                        ],
                        [
                            685438.308503048,
                            7022247.44
                        ],
                        [
                            685438.708375331,

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1 Reply

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by (71.8m points)

I fixed it by using a VectorImageLayer, seems to be a lot faster than a normal VectorLayer


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