I can do that, but will just note what I wrote on the mailing list Sep 26 when I first suggested this:
"The exometer API takes pains to run all costly updates asynchronously, so devices like sidejob should not be needed."
Given that exometer histogram updates are already asynchronous, also going through sidejob might increase latency without adding much benefit. However, I haven't verified that it gives acceptable throughput in all use cases.