From 322f395f319533b1f02f3beeb5953d84e69358ee Mon Sep 17 00:00:00 2001
From: c-blake <c-blake@users.noreply.github.com>
Date: Sun, 27 Jan 2019 07:52:46 -0500
Subject: [PATCH] Make MemSlice stringification both simpler and faster.
 (#10464)

---
 lib/pure/memfiles.nim | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/pure/memfiles.nim b/lib/pure/memfiles.nim
index d1a006eee..277c4ddb6 100644
--- a/lib/pure/memfiles.nim
+++ b/lib/pure/memfiles.nim
@@ -372,9 +372,8 @@ proc `==`*(x, y: MemSlice): bool =
 
 proc `$`*(ms: MemSlice): string {.inline.} =
   ## Return a Nim string built from a MemSlice.
-  var buf = newString(ms.size)
-  copyMem(addr(buf[0]), ms.data, ms.size)
-  result = buf
+  result.setLen(ms.size)
+  copyMem(addr(result[0]), ms.data, ms.size)
 
 iterator memSlices*(mfile: MemFile, delim='\l', eat='\r'): MemSlice {.inline.} =
   ## Iterates over [optional `eat`] `delim`-delimited slices in MemFile `mfile`.