@dnolen For CLJS-2445, do you ultimately think you'd like to review a single patch, or three distinct patches (one each for iterate, repeat and cycle)? There is no rush to decide. I have the salient changes for iterate here if you click on the Files changed tab to get a sense of the size of the change: https://github.com/mfikes/clojurescript/compare/master...CLJS-2445

By the way, the perf improvements are substantial for this one. See this tweet thread https://twitter.com/mfikes/status/942999348983590912

@mfikes I would rather do them all at once