Vega tooltip is slow and displays the same value

[ppf2]

6.3.1

Consider a visualization with this layer:

{
      "mark": {
        "type": "line",
        "color": "#659CCA",
        "point": {"color": "blue"},
        "interpolate": "monotone"
      },
      "encoding": {
        "x": {
          "field": "time",
          "type": "temporal",
          "interval": "day",
          "axis": {
            "format": "%Y-%m-%d %H:%M:%S.%L",
            "title": false,
            "labelAngle": -45
          }
        },
        "y": {
          "field": "dom",
          "type": "quantitative",
          "axis": {"title": "dom time(blue)"}
        },
        "tooltip": {"field": "dom", "type": "quantitative"}
      }
    }

There are 2 issues here:

• Tooltip seems slow, generally takes ~2s for it to show up
• Tooltip appears to always show the same value.

[timroes]

cc @nyurik

[nyurik]

@ppf2 thx for reporting. Could you go into browser dev tool / console window, and type JSON.stringify(VEGA_DEBUG.vega_spec), and copy its result to a file, zip it, and attach it to this ticket? Thanks!

[ppf2]

json.txt
here you go, thx!

[nyurik]

@ppf2 i'm not sure about the performance (try your full graph in https://vega.github.io/editor/#/ - see if you have the same issues there. Make sure to add "width": 300, "height": 300, as the top element though).

As for the identical values - you have two tooltips - on the blue line and another on the blue symbols (dots). Each dot is different, so you get different values for each. But the whole line is basically a single object, so you get the same tooltip anywhere on the line. I think it uses either the very first or very last datapoint for the line tooltip.

[timroes]

Closing this issue due to inactivity.

We are trying to keep our issues to a manageable amount, which means we are trying to close issues we cannot reproduce or gather required information for some time. Please feel free to still provide the requested information in case the issue still persists on an up-to-date Kibana version. We will gladly reopen this issue again.