From f1cdc93b8bbfa3833b9c600ffc05a9d9c1ac5618 Mon Sep 17 00:00:00 2001
From: Glen Hertz <glen.hertz@gmail.com>
Date: Sat, 26 Oct 2013 21:51:43 -0400
Subject: [PATCH] RFC: Immediately return true for equality checks if is(A,B)

Perhaps I'm missing something but why not immediately return true from these checks if the two objects are identical?  If this is valid there are likely other places this could happen too...but I thought I would first check.

Thanks,

Glen
---
 base/abstractarray.jl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/base/abstractarray.jl b/base/abstractarray.jl
index 6b8c2c783f99f..983b089a72ab6 100644
--- a/base/abstractarray.jl
+++ b/base/abstractarray.jl
@@ -1031,6 +1031,7 @@ end
 ## Reductions and scans ##
 
 function isequal(A::AbstractArray, B::AbstractArray)
+    if A === B return true end
     if size(A) != size(B)
         return false
     end
@@ -1054,6 +1055,7 @@ function lexcmp(A::AbstractArray, B::AbstractArray)
 end
 
 function (==)(A::AbstractArray, B::AbstractArray)
+    if A === B return true end
     if size(A) != size(B)
         return false
     end