v.18.14Improvement

Default Enabling of compile_expressions for JIT Compilation

The compile_expressions setting (JIT compilation of expressions) is enabled by default.
The compile_expressions setting, which enables JIT compilation of expressions, is now enabled by default in ClickHouse.

Why it matters

This change improves query execution performance by default by leveraging Just-In-Time (JIT) compilation for expressions, reducing interpretation overhead and making expression evaluation faster without requiring manual configuration.

How to use it

To benefit from this feature, no action is required as the compile_expressions setting is enabled by default. Users can explicitly configure this setting in their server or query settings if they want to disable or modify its behavior.