Scalable Code Testing and Benchmarking

A method or system for testing and benchmarking commits made on source code. The system extracts commits from a history of a first code history that records a sequence of commits made thereon. The extracted commits are then combined into a sequence of patches, each of which includes changes made during consecutive commits. The system also establishes a connection with a system under test (SUT) having a second code repository corresponding to a historical version of the first code repository before the extracted commits were made, and sequentially applies the sequence of the patches to the second code repository. Performance of the SUT is monitored during the application of the sequence of the patches to determine whether the SUT performs as expected after the application of each patch.