diff -p -r1.5 parserInternals.c
*** parserInternals.c	2000/10/09 12:27:32	1.5
--- parserInternals.c	2000/10/15 20:23:28
*************** xmlParserInputShrink(xmlParserInputPtr i
*** 1025,1030 ****
--- 1025,1036 ----
      CHECK_BUFFER(in);
  
      used = in->cur - in->buf->buffer->content;
+     /*
+      * Do not shrink on large buffers whose only a tiny fraction
+      * was consumned
+      */
+     if (in->buf->buffer->use > used + 2 * INPUT_CHUNK)
+ 	return;
      if (used > INPUT_CHUNK) {
  	ret = xmlBufferShrink(in->buf->buffer, used - LINE_LEN);
  	if (ret > 0) {