Mouse pointer is flickering + High CPU usage on file write

[zeoint]

Mouse pointer starts flickering when the progress bar is full and stops after some time.

This is happening because of images in the downloaded folder being swapped or something. This did not happen in hakuneko.

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Flicker.mp4

[Sheepux]

Yup i'm aware of this one and didn't find the cause of the issue :
It happens on file write and only seems to appear on Windows (not macOs, Ronny tested it)
It could be related to a specific NW.js issue ?

[zeoint]

Forgot about this, but the downloads are extemely slow because of this.
The images are downloaded as fast as in hakuneko, but the final stage or something takes anywhere between 10~30 seconds.
As can be seen in the above video.
Please fix it. Thank you.

[Kharlitoz21]

What happens is that while the "download" bar is loading, no chapter is saved in the folder. It’s only at the end, when the bar finishes, that it starts saving all the chapter's images at once. This causes the cursor to freeze momentarily, and my CPU usage spikes to 100%.

[Kharlitoz21]

My solution would be for each image to be saved one by one during the download, so that by the time it finishes, all the images are already in the folder, instead of being saved all at once at the end.