bug report: when load a large text file, such as 30M size . then change into Word wrap mode , Memory crept up to 1.5 gigabytes

[爬山虎]

when load a large text file, such as 30M size , i see The memory usage is within 400M.

but when i change into word warp mode, Memory crept up to 1.5 gigabytes.

After exiting the wrapping mode, memory can come down。

I found notepad++ no such problem. There should be a memory problem, can anybody find it?
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