V2 is slower at rendering simple text

[JSteunou]

v1 has a bypass for empty styles that v2 has not causing lines is twice longer to render. When using fabric use a log of text shapes this is a 100% perf hit compared to v1.

Temporary solution: using cache on those shapes (which improve perf a lot but add a little blur when scaling up and down)

Backport solution: porting the v1 check and logic into v2 like

      if (this.isEmptyStyles()) {
        return this._renderCharsFast(method, ctx, line, left, top);
      }

[asturur]

Re inserting the fix should not be a problem.
In my own case since i had to override renderChars for my own app, i need to think to a fix to my own override to continue working

[asturur]

When scaling the blurriness comes from noScaleCache, that you can disable.

[JSteunou]

Already disabled :(

But it's still better than v1!

[asturur]

that is strange. i would not expect the text to be blurred after a scale.
Can you post the JSON object of one of your groups?

like canvas.getActiveObject().toObject() so that i can try it

[JSteunou]

I cannot reproduce the tiny blur effect with simple fabric usage so I withdraw my remark, it's on my side :(