diff --git a/Library/Homebrew/download_strategy.rb b/Library/Homebrew/download_strategy.rb
index 094e8265ff..e3db1e914f 100644
--- a/Library/Homebrew/download_strategy.rb
+++ b/Library/Homebrew/download_strategy.rb
@@ -209,7 +209,7 @@ class AbstractFileDownloadStrategy < AbstractDownloadStrategy
     Utils.popen_read(tool, "-f", cached_location.to_s, "-c") do |pipe|
       File.open(target, "wb") do |f|
         buf = ""
-        f.write(buf) while pipe.read(1024, buf)
+        f.write(buf) while pipe.read(16384, buf)
       end
     end
   end
diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index 6e704a3720..71f2d6b0b6 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -262,7 +262,7 @@ class Pathname
       digest.file(self)
     else
       buf = ""
-      open("rb") { |f| digest << buf while f.read(1024, buf) }
+      open("rb") { |f| digest << buf while f.read(16384, buf) }
     end
     digest.hexdigest
   end