Thats actually bad but not too bad cause you are not mutationg dom tree. Assume you are mutating dom tree in setimeout then it would have became worst.
Also settimeout is not guaranteed to run exactly after 100ms it may drift all the way beyond 300ms mark (minimal threshhold to show feedback to user of their action) which would irritate user. Try putting a long empty loop after setTimeout and you can see that happening.
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Thats actually bad but not too bad cause you are not mutationg dom tree. Assume you are mutating dom tree in setimeout then it would have became worst.
Also settimeout is not guaranteed to run exactly after 100ms it may drift all the way beyond 300ms mark (minimal threshhold to show feedback to user of their action) which would irritate user. Try putting a long empty loop after setTimeout and you can see that happening.