MySQL 8.0: Charset and Collation Settings Impact on Performance
Posted by: Edwin Desouza
Date: February 27, 2019 06:57PM

Conclusions
- MySQL 5.7 outperforms MySQL 8.0 in latin1 charset
- MySQL 8.0 outperforms MySQL 5.7 by a wide margin if we use utf8mb4 charset
- Be aware that utf8mb4 is now default MySQL 8.0, while MySQL 5.7 has latin1 by default
- When running comparison between MySQL 8.0 vs MySQL 5.7 be aware what charset you are using, as it may affect the comparison a lot.

https://www.percona.com/blog/2019/02/27/charset-and-collation-settings-impact-on-mysql-performance/

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