`nvim_buf_add_highlight()` Causes High Memory Usage

[yuukibarns]

After a long chat, about 300 lines, I found the memory usage of Neovim increased significantly from 40MB to 1.2GB. System monitor shows a consistent memory increase at the rate of 4MB/s when gp.nvim is writing response to the buffer and after the chat ends, the memory usage won't decrease but still the highest level.
#228 fixes this.

[yuukibarns]

However, there is still a 5MB increase in memory after the commit. If further
banned gp.nvim from writing to the buffer, the increase disappeared.
Why such a smiple nvim_buf_set_lines() can cause relatively big memory usage increase?

[dreamtrail]

gp.nvim will continuously redraw the lines for streaming responses, which can be very slow for lengthy outputs. You may just disable the streaming feature , as it is a distraction anyway.

[yuukibarns]

But I do want the streaming feature, for I can stop halfway if the agent does not get the point.