From d0e988189b08b0e83a78f21963148c72c95edf24 Mon Sep 17 00:00:00 2001
From: "valery.bokov" <vlry.bkv@gmail.com>
Date: Tue, 11 Nov 2025 11:19:31 +0100
Subject: [PATCH] improve performance for
 BruteForceParser.bfSearchForObjStreams method

---
 .../java/org/apache/pdfbox/pdfparser/BruteForceParser.java   | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/BruteForceParser.java b/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/BruteForceParser.java
index 3effe713e89..a7422d9bc48 100644
--- a/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/BruteForceParser.java
+++ b/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/BruteForceParser.java
@@ -308,13 +308,14 @@ protected void bfSearchForObjStreams(Map<COSObjectKey, Long> xrefTable) throws I
         Map<Long, COSObjectKey> bfSearchForObjStreamOffsets = bfSearchForObjStreamOffsets();
         Map<COSObjectKey, Long> bfCOSObjectOffsets = getBFCOSObjectOffsets();
         // log warning about skipped stream
-        bfSearchForObjStreamOffsets.entrySet().stream() //
+        Set<Entry<Long, COSObjectKey>> entries = bfSearchForObjStreamOffsets.entrySet();
+        entries.stream() //
                 .filter(o -> bfCOSObjectOffsets.get(o.getValue()) == null) //
                 .forEach(o -> LOG.warn("Skipped incomplete object stream:{} at {}", o.getValue(),
                         o.getKey()));
 
         // collect all stream offsets
-        List<Long> objStreamOffsets = bfSearchForObjStreamOffsets.entrySet().stream() //
+        List<Long> objStreamOffsets = entries.stream() //
                 .filter(o -> bfCOSObjectOffsets.get(o.getValue()) != null) //
                 .filter(o -> o.getKey().equals(bfCOSObjectOffsets.get(o.getValue()))) //
                 .map(Map.Entry::getKey) //