[gs-commits] rev 11611 - trunk/gs/doc

ray at ghostscript.com ray at ghostscript.com
Fri Aug 6 15:49:21 UTC 2010

Author: ray
Date: 2010-08-06 15:49:21 +0000 (Fri, 06 Aug 2010)
New Revision: 11611

Add documentation on -dMaxPatternBitmap=# parameter in the 'Improving
Performance' section of the Use.htm file. The actual parameter was
added in rev 11605.

Modified: trunk/gs/doc/Use.htm
--- trunk/gs/doc/Use.htm	2010-08-06 15:03:00 UTC (rev 11610)
+++ trunk/gs/doc/Use.htm	2010-08-06 15:49:21 UTC (rev 11611)
@@ -2928,6 +2928,17 @@
 operator used by the ps2pdf script and others sets a vmthreshold value of
 3 MB to account for this.
+For pattern tiles that are very large, Ghostscript uses an internal display
+list (memory based clist), but this can slow things down. The current default
+threshold is 8Mb -- pattern tiles larger than this will be cached as clist
+rather than bitmap tiles. The parameter <code>-dMaxPatternBitmap=#</code> can
+be used to adjust this threshold, smaller to reduce memory requirements and
+larger to avoid performance impacts due to clist based pattern handling.
+For example, <code>-dMaxPatternBitmap=200000</code> will use clist based
+patterns for pattern tiles larger than 200,000 bytes. 
 <h2><a name="Environment_variables"></a>Summary of environment variables</h2>

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