
AI-powered code optimization that helps you always ship performant code
Codeflash automatically discovers the fastest version of your Python, JavaScript, and Java code using AI-powered optimization workflows. It generates multiple optimization proposals via large language models, validates correctness through comprehensive regression testing, benchmarks performance improvements, and delivers merge-ready pull requests with zero runtime overhead.
Identifies performance bottlenecks across entire codebases or individual scripts
Uses LLMs to generate multiple optimization proposals for each function, selecting the best-performing one
Runs existing tests plus generates comprehensive regression tests to guarantee identical behavior
Automatically optimizes new code in pull requests via a CI/CD workflow
Continuous optimization directly in the editor during development
Supports Python, JavaScript, TypeScript, Java, and Go
All optimization happens at development time with no performance penalty in production
Automatically optimize Python backend services, ML pipelines, and numerical computing code
Prevent performance regressions by automatically optimizing new code in pull requests
Profile and optimize existing codebases to find quick performance wins without manual effort
Reports exact speed improvements with before/after metrics

The world's first AI super assistant for professionals and enterprises