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coteditor / CotEditor

Lightweight Plain-Text Editor for macOS
https://coteditor.com
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High Memory usage (> 700MB) with (7 non-code text-only files open) on CotEditor: 4.7.4 (630) #1600

Closed ybugroup closed 2 months ago

ybugroup commented 3 months ago

Description

On startup, CotEditor: 4.7.4 (630) takes over 600MB of memory (according to Activity Monitor) rising to 798MB after some light usage. I have 7 tabs open to simple text documents, but have not navigated to any of the tabs other than the single tab open by default.
I have NO development file, e.g. no CSS, no code, no JSON files. Could the high memory usage be caused by the syntax highlighting functionality? If yes, can I turn this functionality off? I have only 8GB of RAM on my MacBook Air M2 15 inch, and I was surprised that CotEditor was the highest memory process in Activity Monitor.

To Reproduce

Run CotEditor with 7 tabs, open Activity Monitor, sort by Memory

Expected behavior

Lower memory usage than browsers, e.g. under 400MB, ideally lower.

CotEditor version

CotEditor: 4.7.4 (630)

macOS version

macOS Version 14.4 (Build 23E214)

Additional context

MacBook Air M2 15 inch, 8GB RAM, 512GB SSD Language: English

1024jp commented 2 months ago

Hi, I have added some measures related to performance to the last updates. Does it work for you?

Could the high memory usage be caused by the syntax highlighting functionality?

It depends on the syntax highlight definition. If the syntax has a lot of, or complex highlighting definitions, it can take a long time. However, in general, if the document is not enormous, the memory use should be reasonably low.

If yes, can I turn this functionality off?

CotEditor doesn't provide the option to disable syntax highlighting.

ybugroup commented 2 months ago

Thank you for looking into the memory issues.  I reinstalled CotEditor and it now uses approx 400mb of memory which is better. Since, I only need a plain text editor with tabs with low memory usage, I have moved TextMate (which has not been updated in a while) but uses less than 100mb of memory.I will switch back to CotEditor if/when syntax highlighting can be disabled and memory usage reduced further.

BTW, the reason I am so focused on RAM is because I have a Macbook M2 with 8GB RAM.  I am sure there are many Mac users with low memory configuration that would love for a native plain text editor like CotEditor without syntax highlighting.

Thanks, Michael

1024jp commented 2 months ago

Thank you for the reply and for the effort to reinstall and check it. It is good news that memory usage has decreased, but I understand that 400 MB is still a lot.

I'm still on the fence about adding an option to disable syntax highlighting, so I can't do it right away, but I will consider the need. Thanks.