Just to set the record straight: we've had a GoLang adapter for Cache/IRIS available since 2019:

https://github.com/chrisemunt/mg_go

Also for Node.js and Bun.js, PHP, Ruby and others.  Check Chris's repository on Github.

Just a note that from JavaScript (Node.js / Bun.js), equivalent things can be also achieved when IRIS is abstracted through the gldsb package, both for old-school Globals and IRIS objects.  See https://github.com/robtweed/glsdb

Just to add: 

The mg-dbx-napi API connection option gives the highest performance (by orders of magnitude - close to native ObjectScript database access performance), but requires the JavaScript runtime (Node.js / Bun.js) to be on the same physical server as IRIS which may present resilience/security concerns for some

The mg-dbx-napi networked connection is slower (limited by network bandwidth) but most resilient and secure option: the JS runtime can reside on a physically separate server from IRIS.