From 5a64e66268471d2141e5b5c72b9658644c113414 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 24 Feb 2016 17:11:31 +0100
Subject: [PATCH] LocalStore::addTextToStore(): Don't read the path we just
 wrote

This eliminates some unnecessary (presumably cached) I/O.
---
 src/libstore/local-store.cc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 308aebd73..1a12c91c7 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1444,14 +1444,16 @@ Path LocalStore::addTextToStore(const string & name, const string & s,
 
             canonicalisePathMetaData(dstPath, -1);
 
-            HashResult hash = hashPath(htSHA256, dstPath);
+            StringSink sink;
+            dumpString(s, sink);
+            auto hash = hashString(htSHA256, sink.s);
 
             optimisePath(dstPath);
 
             ValidPathInfo info;
             info.path = dstPath;
-            info.narHash = hash.first;
-            info.narSize = hash.second;
+            info.narHash = hash;
+            info.narSize = sink.s.size();
             info.references = references;
             registerValidPath(info);
         }