metadata

license: apache-2.0
dataset_info:
  features:
    - name: repo
      dtype: string
    - name: base_commit
      dtype: string
    - name: license
      dtype: string
  splits:
    - name: test
      num_examples: 4814
programming_languages:
  - java
tags:
  - coding
  - code-migration
  - java
  - amazon
  - amazon-science
  - aws

MigrationBench

1. 📖 Overview

🤗 MigrationBench is a large-scale code migration benchmark dataset at the repository level, across multiple programming languages.

Current and initial release includes java 8 repositories with the maven build system, as of May 2025.

2. Datasets

There are three datasets in 🤗 MigrationBench:

All repositories included in the datasets are available on GitHub, under the MIT or Apache-2.0 license.

Index	Dataset	Size	Notes
1	🤗 `AmazonScience/migration-bench-java-full`	5,102	Each repo has a test directory or at least one test case
2	🤗 `AmazonScience/migration-bench-java-selected`	300	A subset of 🤗 `migration-bench-java-full`
3	🤗 `AmazonScience/migration-bench-java-utg`	4,814	The unit test generation (utg) dataset, disjoint with 🤗 `migration-bench-java-full`

3. Metadata

Metadata is provided in the csv file for each dataset:

repo (str): The original repo URL without the https://github.com/ prefix
base_commit (str): Base commit id
- At this commit with java 8 and maven, the repository is able to (1) compile and (2) pass existing unit tests and integration tests if any
- It is the starting point for code migration from java 8
license (str): The license of the repository, either MIT or Apache2.0 for the whole dataset

4. 📚 Citation

@misc{liu2025migrationbenchrepositorylevelcodemigration,
      title={MIGRATION-BENCH: Repository-Level Code Migration Benchmark from Java 8},
      author={Linbo Liu and Xinle Liu and Qiang Zhou and Lin Chen and Yihan Liu and Hoan Nguyen and Behrooz Omidvar-Tehrani and Xi Shen and Jun Huan and Omer Tripp and Anoop Deoras},
      year={2025},
      eprint={2505.09569},
      archivePrefix={arXiv},
      primaryClass={cs.SE},
      url={https://arxiv.org/abs/2505.09569},
}