[tune] Note TPESampler performance issues in docs
#22545
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xwjiang2010
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Feb 22, 2022
simonsays1980
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Feb 27, 2022
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Why are these changes needed?
The default
TPESamplerfor Optuna suffers from performance issues with a large number of completed trials. This is an Optuna issue. This PR adds a warning to the docstring ofOptunaSamplerregarding this.Related issue number
Checks
scripts/format.shto lint the changes in this PR.