Author: stefan2
Date: Sat Jun 25 08:05:41 2011
New Revision: 1139501
URL: http://svn.apache.org/viewvc?rev=1139501&view=rev
Log:
Optimize data processing in svndiff if we don't want to compress input.
* subversion/libsvn_delta/svndiff.c
(zlib_encode): bypass pointless zlib call with the "store" method
Modified:
subversion/trunk/subversion/libsvn_delta/svndiff.c
Modified: subversion/trunk/subversion/libsvn_delta/svndiff.c
URL:
http://svn.apache.org/viewvc/subversion/trunk/subversion/libsvn_delta/svndiff.c?rev=1139501&r1=1139500&r2=1139501&view=diff
==============================================================================
--- subversion/trunk/subversion/libsvn_delta/svndiff.c (original)
+++ subversion/trunk/subversion/libsvn_delta/svndiff.c Sat Jun 25 08:05:41 2011
@@ -144,7 +144,13 @@ zlib_encode(const char *data,
append_encoded_int(out, len);
intlen = out->len;
- if (len < MIN_COMPRESS_SIZE)
+ /* Compression initialization overhead is considered to large for
+ short buffers. Also, if we don't actually want to compress data,
+ ZLIB will produce an output no shorter than the input. Hence,
+ the DATA would directly appended to OUT, so we can do that directly
+ without calling ZLIB before. */
+ if ( (len < MIN_COMPRESS_SIZE)
+ || (compression_level == SVN_DELTA_COMPRESSION_LEVEL_NONE))
{
svn_stringbuf_appendbytes(out, data, len);
}
