1// warning: extremely hot code path.
2// This has been meticulously optimized for use
3// within npm install on large package trees.
4// Do not edit without careful benchmarking.
5module.exports = str => {
6  let i = str.length - 1
7  let slashesStart = -1
8  while (i > -1 && str.charAt(i) === '/') {
9    slashesStart = i
10    i--
11  }
12  return slashesStart === -1 ? str : str.slice(0, slashesStart)
13}
14