HikariCP

JMH benchmarks show HikariCP significantly outperforms competitors like Apache DBCP and c3p0 in connection and statement cycles, with minimal overhead and efficient spike demand handling.

At roughly 165Kb, the library is lightweight, reducing memory usage and startup times compared to bulkier alternatives, as emphasized in the project description.

HikariCP comes pre-configured with optimal settings for most deployments, minimizing tuning needs and reducing configuration errors, as highlighted in the 'Essentials' section.

It automatically handles connection lifecycle, validation using JDBC4 isValid(), and recovery, with features like keepaliveTime to prevent timeouts, as detailed in the configuration knobs.