import { LRUCache } from 'lru-cache'
import * as fs from 'fs'
const lru = new LRUCache<string, string>({ ttl: 250, ttlAutopurge: true })
const origLstat = fs.realpathSync.bind(fs)

// NB: The biggest offender of thrashing realpathSync is the node module system
// itself, which we can't get into via any sane means.
require('fs').realpathSync = function (p) {
    let r = lru.get(p)
    if (r) {
        return r
    }

    r = origLstat(p)
    lru.set(p, r)
    return r
}