Improve performance for large files

[littlecatheart]

When I open a file (1000-5000 lines) with about 50% code; the editing becomes very slow if I insert text in the first line. However, when I edit it inTypora, it's very fast. Do we have plan to optimize the performance?

[littlecatheart]

I think the render algorithm is different. Does TextMart render the whole page even I just change one line? To improve performance, could we just cache the views of other blocks and only update the current block?

[fxha]

Thank you for reporting the issue. We noticed that this is a duplicate of #511 and #1648. You may want to subscribe there for further updates.