Developer documentation for Common Expression Language.

Giandomenico Di Salvatore

Redis

Community Picks is a section on daily.dev where our community members share the most interesting and valuable content they've discovered online. From insightful articles to handy tools, every post is a gem curated by our dedicated coomunity. To contribute to Community Picks, you need to have at least 250 reputation points, ensuring that only active and trusted members can share their finds.

Community Picks

Common Expression Language (CEL) is a fast, portable, and safe expression language designed for embedding in performance-critical applications. It evaluates expressions in nanoseconds to microseconds with predictable costs, making it ideal for use cases like API authorization rules, list filters, and validation constraints on protocol buffers. CEL works best in scenarios where expressions are evaluated frequently but modified infrequently, such as HTTP request security policy evaluation.