A simple for loop with caching

cached-for-loop.js

let items = [
  //unknown number of items
]

// normal for loop
// here items.length is calculated each time the loop cycles
for (let i=0; i<items.length; i++) {
  // inside for
}

// for loop with caching
// here iterations is calculated once and the same is used for each cycle
for (let i=0, iterations=items.length; i<iterations; i++) {
  // inside for
}