From d239f14952b71c9a12fbb1b7e5e2dcf7d9727e1c Mon Sep 17 00:00:00 2001
From: Kevin Backhouse <kevinbackhouse@github.com>
Date: Sun, 14 Apr 2024 14:39:19 +0100
Subject: [PATCH] Fix performance problem in fuzzer.

---
 fuzz/fuzz-read-print-write.cpp | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/fuzz/fuzz-read-print-write.cpp b/fuzz/fuzz-read-print-write.cpp
index 2dee1c23fe..5111d961ce 100644
--- a/fuzz/fuzz-read-print-write.cpp
+++ b/fuzz/fuzz-read-print-write.cpp
@@ -21,16 +21,22 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
 
     image->readMetadata();
     for (auto& md : image->exifData()) {
-      md.print();
-      md.print(&image->exifData());
+      if (md.tagName().substr(0, 2) != "0x") {
+        md.print();
+        md.print(&image->exifData());
+      }
     }
     for (auto& md : image->iptcData()) {
-      md.print();
-      md.print(&image->exifData());
+      if (md.tagName().substr(0, 2) != "0x") {
+        md.print();
+        md.print(&image->exifData());
+      }
     }
     for (auto& md : image->xmpData()) {
-      md.print();
-      md.print(&image->exifData());
+      if (md.tagName().substr(0, 2) != "0x") {
+        md.print();
+        md.print(&image->exifData());
+      }
     }
 
     // Print to a std::ostringstream so that the fuzzer doesn't