Disable OpenSSL compression

I ran into a performance problem described in this thread:

http://archives.postgresql.org/pgsql-performance/2011-10/msg00249.php
continued here:
http://archives.postgresql.org/pgsql-performance/2011-11/msg00045.php

OpenSSL compresses data by default, and that causes a
performance penalty of 100% and more, at least when
SELECTing larger bytea objects.
The backend process becomes CPU bound.

>From OpenSSL version 1.0.0. on, compression can be
disabled.  The attached patch does that, and with that
patch I see dramatic performance improvements:

Unpatched:

samples %       image name         symbol name
6754    83.7861 libz.so.1.2.3      /lib64/libz.so.1.2.3
618      7.6665 libcrypto.so.1.0.0 /usr/lib64/libcrypto.so.1.0.0
534      6.6245 postgres           hex_encode
95       1.1785 libc-2.12.so       memcpy

Patched:

samples %       image name         symbol name
751     50.1670 libcrypto.so.1.0.0 /usr/lib64/libcrypto.so.1.0.0
594     39.6794 postgres           hex_encode
83       5.5444 libc-2.12.so       memcpy

(the test case is selecting one 27 MB bytea in text
mode over a localhost connection)

Are there any objections to this?

It is possible that this could cause a performance
regression for people who SELECT lots of compressible
data over really slow network connections, but is that
a realistic scenario?

If there are concerns about that, maybe a GUC variable like
ssl_compression (defaulting to off) would be a solution.

Yours,
Laurenz Albe