Facebook's `immutable.js` has a `Seq.cacheResult()...

# stdlib

[hastebrot]

Facebook's immutable.js has a Seq.cacheResult() function (https://facebook.github.io/immutable-js/docs/#/Seq/cacheResult).

If you know a Seq will be used multiple times, it may be more efficient to first cache it in memory.

Use this method judiciously, as it must fully evaluate a Seq which can be a burden on memory and possibly performance.