Question
Is there a fast alternative to appendChild when the elements are large?
const output = parent.appendChild(child);
This single function call blocks the main thread of my app making it very slow.
Background
In the minimap-lens package for Atom, I need to append an element to the editor element. However, doing this operation is very expensive and can take ~1 min for the large editor elements (>1500 lines). I think that is because the chromium engine needs to calculate the exact size of DOM elements before doing this.
It happens at this line: appendChild
const parent = atom.views.getView(atom.workspace.getActiveTextEditor())
const output = parent.appendChild(child)