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Coding super-intelligence to find the most optimized Python code. Use it to optimize existing codebases or new Pull requests as a GitHub Action or a VS Code Extension.
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Mohamed Ashraf a582fa6ea8 fix: set tests_project_rootdir to tests_root for Java projects 
Bug #2: Test file name mapping returns null for Java tests

Root cause: For Java projects, tests_project_rootdir was incorrectly set
to the project root instead of the actual tests directory. This caused
test file resolution to fail in parse_test_xml when parsing JUnit XML
from Maven Surefire, which doesn't include file attributes.

JavaScript already had this fix (line 654), but Java was missing it.

Fix: Add Java to the language check that sets tests_project_rootdir
equal to tests_root, ensuring instrumented test files can be found at
src/test/java/com/example/Test__perfinstrumented.java

Changes:
- Added is_java import to discover_unit_tests.py
- Added Java check: if is_java(): cfg.tests_project_rootdir = cfg.tests_root
- Added comprehensive test coverage with 2 test cases

Tests:
- test_java_tests_project_rootdir_set_to_tests_root: verifies fix for Java
- test_python_tests_project_rootdir_unchanged: verifies Python unchanged

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
2026-02-04 00:04:23 +00:00
.github/workflows Merge branch 'omni-java' of github.com:codeflash-ai/codeflash into omni-java 2026-02-02 19:15:37 -08:00
code_to_optimize Merge branch 'omni-java' of github.com:codeflash-ai/codeflash into omni-java 2026-02-02 19:15:37 -08:00
codeflash fix: set tests_project_rootdir to tests_root for Java projects 2026-02-04 00:04:23 +00:00
codeflash-benchmark cond addopts 2025-08-24 01:59:48 -05:00
codeflash-java-runtime/src fix: update Java Comparator to read from test_results table 2026-02-03 00:23:01 +00:00
docs e2e working java 2026-01-30 10:52:45 -08:00
experiments fix: lint issues in experiments folder and format fixes 2026-01-29 19:26:50 +05:30
npm-package add refinement and cleanup 2026-01-21 05:28:03 +05:30
packages/codeflash update package to 0.5.0 2026-02-02 23:48:16 +05:30
tests fix: set tests_project_rootdir to tests_root for Java projects 2026-02-04 00:04:23 +00:00
.gitignore feat: add Java end-to-end tests and CI workflow 2026-02-03 01:17:17 +00:00
.pre-commit-config.yaml Update .pre-commit-config.yaml 2025-08-05 20:51:58 -07:00
CLAUDE.md update claude.md 2026-01-30 16:51:48 -08:00
codeflash.code-workspace improve codeflash debugging 2025-06-26 15:00:35 -07:00
MULTI_LANGUAGE_ARCHITECTURE.md wip instrumentation and execution 2026-01-15 12:13:37 -08:00
mypy_allowlist.txt rename file name 2025-06-05 20:08:09 -07:00
pyproject.toml wip java support 2026-01-30 00:37:24 -08:00
README.md release/v0.17.0 (#756) 2025-09-23 14:02:30 -07:00
SECURITY.md Create SECURITY.md 2025-08-06 18:50:57 -07:00
uv.lock e2e working java 2026-01-30 10:52:45 -08:00

README.md

Codeflash-banner

GitHub commit activity PyPI Downloads PyPI Downloads

Codeflash is a general purpose optimizer for Python that helps you improve the performance of your Python code while maintaining its correctness. It uses advanced LLMs to generate multiple optimization ideas for your code, tests them to be correct and benchmarks them for performance. It then creates merge-ready pull requests containing the best optimization found, which you can review and merge.

How to use Codeflash -

  • Optimize an entire existing codebase by running codeflash --all
  • Automate optimizing all future code you will write by installing Codeflash as a GitHub action.
  • Optimize a Python workflow python myscript.py end-to-end by running codeflash optimize myscript.py

Codeflash is used by top engineering teams at Pydantic (PRs Merged), Roboflow (PRs Merged 1, PRs Merged 2), Unstructured (PRs Merged 1, PRs Merged 2), Langflow (PRs Merged) and many others to ship performant, expert level code.

Codeflash is great at optimizing AI Agents, Computer Vision algorithms, PyTorch code, numerical code, backend code or anything else you might write with Python.

Installation

To install Codeflash, run:

pip install codeflash

Add codeflash as a development time dependency if you are using package managers like uv or poetry.

Quick Start

  1. To configure Codeflash for a project, at the root directory of your project where the pyproject.toml file is located, run:

    codeflash init
    • It will ask you a few questions about your project like the location of your code and tests
    • Ask you to generate an API Key to access Codeflash's LLMs
    • Install a GitHub app to open Pull Requests on GitHub.
    • Ask if you want to setup a GitHub actions which will optimize all your future code.
    • The codeflash config is then saved in the pyproject.toml file.

  2. Optimize your entire codebase:

    codeflash --all

    This can take a while to run for a large codebase, but it will keep opening PRs as it finds optimizations.

  3. Optimize a script:

    codeflash optimize myscript.py

Documentation

For detailed installation and usage instructions, visit our documentation at docs.codeflash.ai

Demo

  • Optimizing the performance of new code for a Pull Request through GitHub Actions. This lets you ship code quickly while ensuring it remains performant.

https://github.com/user-attachments/assets/38f44f4e-be1c-4f84-8db9-63d5ee3e61e5

  • Optiming a workflow end to end automatically with codeflash optimize

https://github.com/user-attachments/assets/355ba295-eb5a-453a-8968-7fb35c70d16c

Support

Join our community for support and discussions. If you have any questions, feel free to reach out to us using one of the following methods:

License

Codeflash is licensed under the BSL-1.1 License. See the LICENSE file for details.