From 1dbfb3f3a0831e6c5f399c34b86faca4790dc40d Mon Sep 17 00:00:00 2001
From: Milan Bouchet-Valat <nalimilan@club.fr>
Date: Sun, 3 Jul 2016 22:55:57 +0200
Subject: [PATCH] More efficient conversion in ^(::Complex, ::Complex) (#17259)

This can avoid a costly allocation of e.g. BigInt(2).
---
 base/complex.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/complex.jl b/base/complex.jl
index 07e004b3519cf..afd39316cad6f 100644
--- a/base/complex.jl
+++ b/base/complex.jl
@@ -450,7 +450,7 @@ function ^{T<:AbstractFloat}(z::Complex{T}, p::Complex{T})
     if p==2 #square
         zr, zi = reim(z)
         x = (zr-zi)*(zr+zi)
-        y = T(2)*zr*zi
+        y = T(2*zr*zi)
         if isnan(x)
             if isinf(y)
                 x = copysign(zero(T),zr)