Wasm-R3 is a record and replay framework that enables generation of standalone WebAssembly Benchmarks.

We recommend you consult the wasm-r3.yml workflow file to see the most up-to-date way to build and run the tool.

Pre-built docker images are also provided at doehyunbaek1/wasm-r3, but they are not always updated following the main branch.

As one of the authors regularly run Wasm-R3 on his Arm Mac machine, we are confident Wasm-R3 works well across Linux and Mac.

If you have any problems, please post Github Issue.

npm start <url>

• <url>: The url of the web app you want to record. Make sure it acutally uses wasm.

The command will start the recording. To stop the recording type any key into the terminal and press enter. The benchmark will be saved to disk.

npm test

There are three categories of tests:

• node: These tests the basic functionality of the tracer and replay generator. These tests are basically unit tests
• offline: These tests run Wasm-R3 on web applications that get hosted locally to test the (almost) end to end functionality.
• online: These tests run on real world online web applications in order to confirm which websites are currently supported by Wasm-R3.

To test only certain categories just provide the specific categories you want to test as an argument to the test command.

The faithfulness of Wasm-R3 is tested by comparing the trace generated during record with the trace generated during replay. The results of the testcases will be generated in the corresponding folders. Interesting files are the report.txt which contains information why a testcase failed. Also the trace for the record and the replay phase gets saved in .r3 files.

A 15-mintue talk given by one of the authors at Wasm Research Day 2024 is publicly available. You can find a brief discussion of the motivation, approach, and evaluation of Wasm-R3.

A 10-minute demo performed by one of the authors at Wasm Research Day 2024 is publicly available.

You can find a usage walkthorugh of Wasm-R3 and a sneak peak into its inner workings.

Please refer to Wasm-R3 via our OOPSLA'24 paper:

@inproceedings{Baek2024Wasm-R3,
  title = {Wasm-R3: Record-Reduce-Replay for Realistic and Standalone WebAssembly Benchmarks},
  author = {Baek, Doehyun and Getz, Jakob and Sim, Yusung and Lehmann, Daniel and Titzer, Ben and Ryu, Sukyoung and Pradel, Michael},
  year = {2024},
  booktitle = {Proceedings of the ACM on Programming Languages: Object-Oriented Programming, Systems, Languages \& Applications},
  series = {OOPSLA '24},
}