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Memory leak fixes #724

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Merged
merged 4 commits into from
Jul 8, 2016
Merged

Memory leak fixes #724

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c123ebc
Memory leak fix candidates: 1) purge must destroy scene2d otherwise r…
monfera Jul 6, 2016
6c92920
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monfera Jul 6, 2016
57c7779
Call cleanPlot from newPlot directly; Changed the location of the tra…
monfera Jul 8, 2016
8937668
Adding test cases that check that Plotly.newPlot indeed causes derefe…
monfera Jul 8, 2016
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8 changes: 8 additions & 0 deletions src/plots/gl2d/scene2d.js
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Original file line number Diff line number Diff line change
Expand Up @@ -318,6 +318,14 @@ proto.destroy = function() {

this.glplot = null;
this.stopped = true;

var traces = this.traces;
if(traces) {
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Nice find.

I think the gl-plot3d cleans its trace objects internally, but it would worth double checking 👍

Object.keys(traces).map(function(key) {
traces[key].dispose();
traces[key] = null;
});
}
};

proto.plot = function(fullData, calcData, fullLayout) {
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10 changes: 10 additions & 0 deletions src/plots/plots.js
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Expand Up @@ -809,6 +809,16 @@ plots.purge = function(gd) {
// remove modebar
if(fullLayout._modeBar) fullLayout._modeBar.destroy();

if(fullLayout._plots) {
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Hmm. Gl context deletion should be already taken care of via Plots.cleanPlot which is currently called in Plots.supplyDefaults here and more explicity in Plotly.purge here.

Maybe something is up with the gl2d clean method?

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@monfera monfera Jul 7, 2016 •
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@etpinard I was chasing a point pick regression but back on this now. The root call is a Plotly.newPlot. It does call supplyDefaults and cleanPlot. But basePlotModules is [] empty so it doesn't even reach the point of testing if there is a _module.clean metod. I'm carrying on looking, based on your hint, but wanted to mention it in case it rings a bell.

P.S. In fact, oldFullLayout looks like an empty object. I'm swimming upstream.

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@monfera monfera Jul 7, 2016 •
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... looks like plots.purge deletes gd._fullLayout just before Plotly.plot is called (the latter of which then calls supplyDefaults which calls cleanPlot) so by the time cleanPlot is called, there's no longer information about what to clean.

I'm in a bit of a conundrum as there's a big amount of statefulness and I'm concerned that a purported fix from me (e.g. not delete gd._fullLayout in purge so the info stays around) has unintended, undesirable consequences, besides the fact that it would allow proper working of the _module.clean loop. So I'd rather get input @etpinard before shoehorning in something that looks like a fix.

Plotly.newPlot = function(gd, data, layout, config) {
    gd = getGraphDiv(gd);
    Plots.purge(gd);   // <= this deletes gd._fullLayout
    return Plotly.plot(gd, data, layout, config);  // <= cleanPlot would rely on gd._fullLayout
};

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so by the time cleanPlot is called, there's no longer information about what to clean.

Wow. That's bad. Nice catch.

I think the best solution at the moment would be to add

 // remove gl contexts
Plots.cleanPlot([], {}, fullData, fullLayout);

to Plotly.newPlot before it calls Plots.purge.

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Thanks @etpinard! This

Plotly.newPlot = function(gd, data, layout, config) {
    gd = getGraphDiv(gd);

    // remove gl contexts
    Plots.cleanPlot([], {}, gd._fullData || {}, gd._fullLayout || {});

    Plots.purge(gd);
    return Plotly.plot(gd, data, layout, config);
};

seems to go ahead and ultimately call scene2d destroy method which has my few lines of trace line disposals. I'll double-check via remeasuring the memory footprint, but for that test I have to cherrypick it into the local branch which also has the undo history limit.

Object.keys(fullLayout._plots).map(function(key) {
var plot = fullLayout._plots[key];
if(plot._scene2d) {
plot._scene2d.destroy();
plot._scene2d = null;
}
});
}

// data and layout
delete gd.data;
delete gd.layout;
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