[Unity] Benchmark in readme for jint vs puerts

[yosun]

i am curious how does puerts for javascript in unity runtime compare to just using jint - are there benchmarks?

[神麤詭末]

I think puerts is definitely faster if it's pure js content, but jint should be better in terms of memory footprint and cross-language interaction, although the js engine used by puerts also has better support for the es specification.

[chexiongsheng]

you are curious for this, you can do this and share the result.