Add 'neozip/' from commit 'c2712b8a345191f6ed79558c089777df94590087'

git-subtree-dir: neozip
git-subtree-mainline: b1e34e861b5d732afe828d58aad2c638135061fd
git-subtree-split: c2712b8a345191f6ed79558c089777df94590087

1 files changed, 75 insertions, 0 deletions

diff --git a/neozip/test/benchmarks/benchmark_compress.cc b/neozip/test/benchmarks/benchmark_compress.cc
new file mode 100644
index 0000000000..df042f7153
--- /dev/null
+++ b/neozip/test/benchmarks/benchmark_compress.cc
@@ -0,0 +1,75 @@
+/* benchmark_compress.cc -- benchmark compress()
+ * Copyright (C) 2024-2025 Hans Kristian Rosbach
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <benchmark/benchmark.h>
+
+extern "C" {
+#  include "zbuild.h"
+#  include "zutil_p.h"
+#  if defined(ZLIB_COMPAT)
+#    include "zlib.h"
+#  else
+#    include "zlib-ng.h"
+#  endif
+#  include "test/compressible_data_p.h"
+}
+
+#define MAX_SIZE (64 * 1024)
+
+class compress_bench: public benchmark::Fixture {
+private:
+    uint8_t *inbuff;
+    uint8_t *outbuff;
+
+public:
+    void SetUp(::benchmark::State& state) {
+        outbuff = (uint8_t *)malloc(MAX_SIZE + 16);
+        if (outbuff == NULL) {
+            state.SkipWithError("malloc failed");
+            return;
+        }
+
+        // Initialize input buffer with highly compressible data, interspersed
+        // with small amounts of random data and 3-byte matches.
+        inbuff = gen_compressible_data(MAX_SIZE);
+        if (inbuff == NULL) {
+            free(outbuff);
+            outbuff = NULL;
+            state.SkipWithError("gen_compressible_data() failed");
+            return;
+        }
+    }
+
+    void Bench(benchmark::State& state) {
+        int err = 0;
+
+        for (auto _ : state) {
+            z_uintmax_t compressed_size = MAX_SIZE + 16;
+            err = PREFIX(compress)(outbuff, &compressed_size, inbuff, (size_t)state.range(0));
+            if (err != Z_OK) {
+                fprintf(stderr, "compress() failed with error %d\n", err);
+                abort();
+            }
+
+            // Prevent the result from being optimized away
+            benchmark::DoNotOptimize(err);
+        }
+    }
+
+    void TearDown(const ::benchmark::State&) {
+        free(inbuff);
+        free(outbuff);
+    }
+};
+
+#define BENCHMARK_COMPRESS(name) \
+    BENCHMARK_DEFINE_F(compress_bench, name)(benchmark::State& state) { \
+        Bench(state); \
+    } \
+    BENCHMARK_REGISTER_F(compress_bench, name)->Arg(1)->Arg(16)->Arg(48)->Arg(256)->Arg(1<<10)->Arg(4<<10)->Arg(16<<10)->Arg(64<<10);
+
+BENCHMARK_COMPRESS(compress_bench);