Array optimization fixes performance issues (fixes #305, #311)

1 files changed, 8 insertions, 0 deletions

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+2019-08-17  Jay Berkenbilt  <ejb@ql.org>
+
+	* Change internal implementation of QPDF arrays to use sparse
+	arrays, which results in using much less memory for arrays with
+	large numbers of nulls. Various files have been encountered in the
+	wild that contains thousands of arrays with millions of nulls.
+	Fixes #305, #311.
+
 2019-07-03  Jay Berkenbilt  <ejb@ql.org>
 
 	* Non-compatible API change: change