1 files changed, 68 insertions, 0 deletions
diff --git a/benchmark/image_benchmark.cc b/benchmark/image_benchmark.cc
new file mode 100644
index 000000000..3e0f7bb8d
--- /dev/null
+++ b/benchmark/image_benchmark.cc
@@ -0,0 +1,68 @@
+/*
+    Copyright (C) 2026 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "lib/image.h"
+#include "lib/timer.h"
+#include "libavutil/pixfmt.h"
+
+
+using std::string;
+
+
+void image_benchmark();
+
+
+int main()
+{
+	image_benchmark();
+	return 0;
+}
+
+
+void
+image_benchmark()
+{
+	auto constexpr TRIALS = 1024;
+
+	auto make_black = [](AVPixelFormat fmt, string fmt_name) {
+		auto image = std::make_shared<Image>(fmt, dcp::Size{ 3996, 2160 }, Image::Alignment::COMPACT);
+		PeriodTimer timer("Image::make_black " + fmt_name);
+		for (auto i = 0; i < TRIALS; ++i) {
+			image->make_black();
+		}
+	};
+
+	make_black(AV_PIX_FMT_UYVY422, "AV_PIX_FMT_UYVY422");
+	make_black(AV_PIX_FMT_YUV422P9LE, "AV_PIX_FMT_YUV422P9LE");
+
+	auto make_part_black = [](AVPixelFormat fmt, string fmt_name) {
+		auto image = std::make_shared<Image>(fmt, dcp::Size{ 3996, 2160 }, Image::Alignment::COMPACT);
+		PeriodTimer timer("Image::make_part_black " + fmt_name);
+		for (auto i = 0; i < TRIALS; ++i) {
+			image->make_part_black(9, 384);
+		}
+	};
+
+	make_part_black(AV_PIX_FMT_YUV420P, "AV_PIX_FMT_YUV420P");
+	make_part_black(AV_PIX_FMT_YUV422P10LE, "AV_PIX_FMT_YUV422P10LE");
+	make_part_black(AV_PIX_FMT_YUV444P10LE, "AV_PIX_FMT_YUV444P10LE");
+}
+