1. Implement hash functions in JavaScript, measure their performance/quality.
2. Create my own experimental hash functions, trying to beat the performance of existing implementations while retaining comparable quality benchmarks.

3. Implement PRNGs in JavaScript, measure their performance/quality.
4. Study the differences between checksums and hash functions, recognizing their effectiveness and use cases.
5. Study similarities/differences between PRNGs and hashes, such as shared use of bit scrambling techniques.
6. Implement stream ciphers in JavaScript (encryption). I've already done RC4 / RC4a.

JavaScript has few suitable libraries/functions for hashing. Some are bloated or needlessly complicated, some are slow or inefficient. Some contain code specific to Node.js, so a total rewrite would be required to run the same code in a browser.

There is also the fact that most hash functions are implemented in compiled languages such as C/C++, and use 64-bit arithmetic. JavaScript is limited to 32-bit bitwise operations and can only resolve integers safely up to 52-bits. And the performance benchmark claims from C versions can be thrown out of the window, because JS typically has very different performance.

All in all, no one is making good, performant hash functions for JavaScript.