From 5dc44874c319f1a91d53c9e8857bc2c63eea3827 Mon Sep 17 00:00:00 2001
From: Jeremy Yallop <yallop@docker.com>
Date: Mon, 12 Dec 2016 15:56:36 +0000
Subject: [PATCH] fs: cache non-symlinks in realpathSync.

Extend `fs.realpathSync` to cache the results for paths that are not
symlinks in addition to caching symlink mappings.

PR-URL: https://github.com/nodejs/node/pull/10253
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 lib/fs.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/fs.js b/lib/fs.js
index bd027c34279..c4f7d706173 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1528,6 +1528,7 @@ fs.realpathSync = function realpathSync(p, options) {
       var stat = fs.lstatSync(base);
       if (!stat.isSymbolicLink()) {
         knownHard[base] = true;
+        if (cache) cache.set(base, base);
         continue;
       }