Make logging cheaper in the non-verbose case

1 files changed, 10 insertions, 3 deletions

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index ab8bbd538..2277d3d7e 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -538,9 +538,16 @@ class Formula
     File.open(logfn, 'w') do |f|
       f.puts Time.now, "", cmd, args, ""
 
-      while buf = rd.gets
-        f.puts buf
-        puts buf if ARGV.verbose?
+      if ARGV.verbose?
+        while buf = rd.gets
+          f.puts buf
+          puts buf
+        end
+      elsif IO.respond_to?(:copy_stream)
+        IO.copy_stream(rd, f)
+      else
+        buf = ""
+        f.write(buf) while rd.read(1024, buf)
       end
 
       Process.wait(pid)