From 3cfd75b849ef60eeeb6b00c325cf40f17278cb77 Mon Sep 17 00:00:00 2001
From: Rafael Fourquet <fourquet.rafael@gmail.com>
Date: Mon, 21 Aug 2017 17:22:16 +0200
Subject: [PATCH] define Symbol(s::Symbol) = s for performance

Before, `Symbol(:symbol)` was calling the generic
`Symbo(x...)` method which in turns calls `string(x...)`;
this is too slow for just returning the argument.
---
 base/boot.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/base/boot.jl b/base/boot.jl
index be8f10aadd8dd..222a9766ab2f4 100644
--- a/base/boot.jl
+++ b/base/boot.jl
@@ -389,6 +389,7 @@ function Symbol(a::Array{UInt8,1})
                  ccall(:jl_array_ptr, Ptr{UInt8}, (Any,), a),
                  Intrinsics.arraylen(a))
 end
+Symbol(s::Symbol) = s
 
 # docsystem basics
 macro doc(x...)