Sample Charts are Laggy in Firefox since Version 2.8.0

[ThatIsAPseudo]

Documentation Is:

• Missing or needed
• Confusing
• Not Sure?

Please Explain in Detail...

I did not understand why the documentation's examples were really smooth and responsive whereas my own code was laggy and slow.
Turns out 2.8 and above slows down (my?) charts (I may fill another issue for this), and despite the tag latest in the documentation's url (www.chartjs.org/docs/latest/charts/doughnut.html), some examples seem to still use an older version.

(But it looks like the Samples use a more recent version since they are slower.)

Your Proposal for Changes

Examples should all be using the version of Chartjs tagged in the URL to avoid confusion.

Example

Samples :

• https://www.chartjs.org/samples/2.7.0/charts/pie.html is faster
• https://www.chartjs.org/samples/latest/charts/pie.html is laggy

Documentation :

• https://www.chartjs.org/docs/2.7.0/charts/doughnut.html is faster
• https://www.chartjs.org/docs/latest/charts/doughnut.html is... faster too ?

Edit: I used Firefox; with Chrome it's much less "laggy", so the difference isn't really noticeable.

[etimberg]

@ThatIsAPseudo do you see similar lag in v3 alpha? https://www.chartjs.org/samples/master/charts/pie.html

[ThatIsAPseudo]

@etimberg Yes, v3 is slow as well.

[kurkle]

For v2, the docs use gitbook and chartjs is injected through plugin.
It looks like the plugin uses chart.js v2.5.0.

In v3 we moved away from gitbook, so it does not really make sense to update the gitbook plugin anymore.

May I ask what kind of environment are you using to detect the lag?

latest

2.7.0

master

All using chrome, because its easy to do the benchmark in that.

So that would suggest that v2.7.0 is actually the slowest one.

There have been some improvement on the border drawing, so there is a little bit more computing in later versions. But it is really insignificant at least in the ways I can measure it.

[ThatIsAPseudo]

Well, I just tried to replicate the issue but everything seems to be working well. I don't know if changes were made but the example I pointed out as laggy (https://www.chartjs.org/samples/latest/charts/pie.html) is smooth now.

[kurkle]

Closing as not reproducible. Please reopen, if you find a way.