From f1c131ae49e9e314fd452dbb387c26882fa75059 Mon Sep 17 00:00:00 2001
From: Lilith Orion Hafner <lilithhafner@gmail.com>
Date: Mon, 29 May 2023 10:04:35 -0500
Subject: [PATCH] Use `top_set_bit` to optimize `hash(Real)`

---
 base/float.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/float.jl b/base/float.jl
index eb30c087c0f8c..3ea45fd140176 100644
--- a/base/float.jl
+++ b/base/float.jl
@@ -687,7 +687,7 @@ function hash(x::Real, h::UInt)
 
     # handle values representable as Int64, UInt64, Float64
     if den == 1
-        left = ndigits0z(num,2) + pow
+        left = top_set_bit(num) + pow
         right = trailing_zeros(num) + pow
         if -1074 <= right
             if 0 <= right && left <= 64